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934664-41-2 Usage

Uses

tert-Butyl 3-Methyleneazetidine-1-carboxylate is a useful reagent used in the preparation of functionalized difluorocyclopropanes as building blocks for drug discoveries.

Check Digit Verification of cas no

The CAS Registry Mumber 934664-41-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,3,4,6,6 and 4 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 934664-41:
(8*9)+(7*3)+(6*4)+(5*6)+(4*6)+(3*4)+(2*4)+(1*1)=192
192 % 10 = 2
So 934664-41-2 is a valid CAS Registry Number.

934664-41-2SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name tert-butyl 3-methylideneazetidine-1-carboxylate

1.2 Other means of identification

Product number -
Other names 1-Boc-3-methylideneazetidine

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:934664-41-2 SDS

934664-41-2Synthetic route

tert-butyl 3-oxoazetidine-1-carboxylate
398489-26-4

tert-butyl 3-oxoazetidine-1-carboxylate

Methyltriphenylphosphonium bromide
1779-49-3

Methyltriphenylphosphonium bromide

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
Stage #1: potassium tert-butylate; Methyltriphenylphosphonium bromide In diethyl ether at 20℃; for 1h;
Stage #2: tert-butyl 3-oxoazetidine-1-carboxylate In diethyl ether at 35℃; for 2h;
100%
Stage #1: Methyltriphenylphosphonium bromide With potassium tert-butylate In diethyl ether at 20℃; for 1h;
Stage #2: tert-butyl 3-oxoazetidine-1-carboxylate In diethyl ether at 35℃; for 2h;
100%
Stage #1: Methyltriphenylphosphonium bromide With potassium tert-butylate In diethyl ether at 20℃; for 1h;
Stage #2: tert-butyl 3-oxoazetidine-1-carboxylate In diethyl ether at 35℃; for 2h;
100%
tert-butyl 3-oxoazetidine-1-carboxylate
398489-26-4

tert-butyl 3-oxoazetidine-1-carboxylate

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With potassium tert-butylate; methyl-triphenylphosphonium iodide In diethyl ether at 35℃; for 2h;99%
tert-butyl 3-oxoazetidine-1-carboxylate
398489-26-4

tert-butyl 3-oxoazetidine-1-carboxylate

methyl-triphenylphosphonium iodide
2065-66-9

methyl-triphenylphosphonium iodide

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
Stage #1: methyl-triphenylphosphonium iodide With potassium tert-butylate In tetrahydrofuran at 0℃; for 0.5h; Inert atmosphere;
Stage #2: tert-butyl 3-oxoazetidine-1-carboxylate In tetrahydrofuran at 10 - 20℃; for 2h;
96%
tert-butyl 3-oxoazetidine-1-carboxylate
398489-26-4

tert-butyl 3-oxoazetidine-1-carboxylate

triphenylphosphine methyl bromide

triphenylphosphine methyl bromide

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With potassium tert-butylate In diethyl ether at 20℃;61%
di-tert-butyl dicarbonate
24424-99-5

di-tert-butyl dicarbonate

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
Multi-step reaction with 3 steps
1.1: triethylamine / methanol / 2.5 h / -10 °C
1.2: -10 °C
2.1: oxalyl dichloride; triethylamine / dichloromethane; dimethyl sulfoxide / 15 h / -78 - 20 °C
3.1: potassium tert-butylate; methyl-triphenylphosphonium iodide / diethyl ether / 2 h / 35 °C
View Scheme
tert-butyl 3-hydroxyazetidine-1-carboxylate
141699-55-0

tert-butyl 3-hydroxyazetidine-1-carboxylate

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: oxalyl dichloride; triethylamine / dichloromethane; dimethyl sulfoxide / 15 h / -78 - 20 °C
2: potassium tert-butylate; methyl-triphenylphosphonium iodide / diethyl ether / 2 h / 35 °C
View Scheme
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

5,5-dimethyl-4,5-dihydro-isoxazole-3-carboxylic acid ethyl ester

5,5-dimethyl-4,5-dihydro-isoxazole-3-carboxylic acid ethyl ester

C17H28N2O5

C17H28N2O5

Conditions
ConditionsYield
With fac-tris(2-(4,6-difluorophenyl)pyridinato,N,C(2'))iridium(III) In acetonitrile at 20℃; Paterno-Buechi Cycloaddition; Irradiation; Sealed tube; Inert atmosphere; regioselective reaction;99%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

(trifluoromethyl)trimethylsilane
81290-20-2

(trifluoromethyl)trimethylsilane

tert-butyl 1,1-difluoro-5-azaspiro[2.3]hexane-5-carboxylate

tert-butyl 1,1-difluoro-5-azaspiro[2.3]hexane-5-carboxylate

Conditions
ConditionsYield
With sodium iodide In tetrahydrofuran for 8h; Reflux;91%
With sodium iodide In tetrahydrofuran at 65℃; Inert atmosphere;64%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

3-hydroxymethyl-azetidine-1-carboxylic acid tert-butyl ester
142253-56-3

3-hydroxymethyl-azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With borane-THF In tetrahydrofuran at 20℃; for 1h;
Stage #2: With dihydrogen peroxide; sodium hydroxide In tetrahydrofuran at 20℃; for 1h;
90.9%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

C14H17NO4

C14H17NO4

C23H32N2O6

C23H32N2O6

Conditions
ConditionsYield
With fac-tris(2-(4,6-difluorophenyl)pyridinato,N,C(2'))iridium(III) In acetonitrile at 20℃; Paterno-Buechi Cycloaddition; Irradiation; Sealed tube; Inert atmosphere; regioselective reaction;88%
piperidine
110-89-4

piperidine

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-chloro-3-(piperidin-1-ylmethyl)azetidine-1-carboxylate

tert-butyl 3-chloro-3-(piperidin-1-ylmethyl)azetidine-1-carboxylate

Conditions
ConditionsYield
Stage #1: piperidine With N-chloro-succinimide; tris(2,2-bipyridine)ruthenium(II) hexafluorophosphate In dichloromethane at 20℃; for 1h; Sealed tube; Inert atmosphere;
Stage #2: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With trifluoroacetic acid In dichloromethane at 0℃; for 1h; Sealed tube; Inert atmosphere; Irradiation;
85%
5-bromoquinoline
4964-71-0

5-bromoquinoline

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-(quinolin-5-ylmethylene)azetidine-1-carboxylate

tert-butyl 3-(quinolin-5-ylmethylene)azetidine-1-carboxylate

Conditions
ConditionsYield
With palladium diacetate; triethylamine; tris-(o-tolyl)phosphine In acetonitrile at 100℃; for 19h; Sealed tube; Inert atmosphere;82%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

1-(1-(4-bromobenzyl)-1H-indol-5-yl)-5-methyl-1H-pyrazole-3-carboxamide

1-(1-(4-bromobenzyl)-1H-indol-5-yl)-5-methyl-1H-pyrazole-3-carboxamide

tert-butyl 3-(4-((5-(3-carbamoyl-5-methyl-1H-pyrazol-1-yl)-1H-indol-1-yl)methyl)benzyl)azetidine-1-carboxylate

tert-butyl 3-(4-((5-(3-carbamoyl-5-methyl-1H-pyrazol-1-yl)-1H-indol-1-yl)methyl)benzyl)azetidine-1-carboxylate

Conditions
ConditionsYield
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran at 60℃; for 16h; Sealed tube;
Stage #2: 1-(1-(4-bromobenzyl)-1H-indol-5-yl)-5-methyl-1H-pyrazole-3-carboxamide With dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II)*CH2Cl2; potassium carbonate In tetrahydrofuran; water; N,N-dimethyl-formamide at 20 - 80℃; for 16h; Suzuki-Miyaura Coupling; Inert atmosphere;
81%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

N-dibromomethylidenehydroxylamine
74213-24-4

N-dibromomethylidenehydroxylamine

tert-butyl 7-bromo-5-oxa-2,6-diazaspiro[3,4]oct-6-ene-2-carboxylate

tert-butyl 7-bromo-5-oxa-2,6-diazaspiro[3,4]oct-6-ene-2-carboxylate

Conditions
ConditionsYield
With sodium hydrogencarbonate In ethyl acetate at 20 - 50℃; for 19h;79%
With sodium hydrogencarbonate In ethyl acetate at 20 - 50℃; for 19h;27.8 g
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

3-methylazetidine-1-carboxylic acid tert-butyl ester

3-methylazetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With Methyltriphenylphosphonium bromide; sodium hydride In tetrahydrofuran for 4.5h;73.2%
Difluoroacetic acid
381-73-7

Difluoroacetic acid

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-(2,2-difluoroethyl)azetidine-1-carboxylate

tert-butyl 3-(2,2-difluoroethyl)azetidine-1-carboxylate

Conditions
ConditionsYield
With tetrahydrofuran; [bis(acetoxy)iodo]benzene at 10 - 50℃; Irradiation; regioselective reaction;67%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

chlorofluoroacetic acid
471-44-3

chlorofluoroacetic acid

tert-butyl 3-(2-chloro-2-fluoroethyl)azetidine-1-carboxylate

tert-butyl 3-(2-chloro-2-fluoroethyl)azetidine-1-carboxylate

Conditions
ConditionsYield
With [bis(acetoxy)iodo]benzene In tetrahydrofuran at 20℃; for 19h; Irradiation;67%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

(Z)-2-(hydroxyimino)-2-phenylacetic acid
25327-36-0

(Z)-2-(hydroxyimino)-2-phenylacetic acid

tert-butyl 7-phenyl-5-oxa-2,6-diazaspiro[3.4]oct-6-ene-2-carboxylate

tert-butyl 7-phenyl-5-oxa-2,6-diazaspiro[3.4]oct-6-ene-2-carboxylate

Conditions
ConditionsYield
With Oxone; tris(2,2'-bipyridyl)ruthenium dichloride; sodium hydrogencarbonate In N,N-dimethyl-formamide at 20℃; for 18h; Sealed tube; Irradiation;65%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

6-bromo-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triazaphenanthren-3-one
1613721-69-9

6-bromo-4-methyl-2,10-dihydro-9-oxa-1,2,4a-triazaphenanthren-3-one

3-(4-methyl-3-oxo-2,3,4,10-tetrahydro-9-oxa-1,2,4a-triazaphenanthren-6-ylmethylene)azetidine-1-carboxylic acid tert-butyl ester
1613720-19-6

3-(4-methyl-3-oxo-2,3,4,10-tetrahydro-9-oxa-1,2,4a-triazaphenanthren-6-ylmethylene)azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With palladium diacetate; triethylamine; tris-(o-tolyl)phosphine In acetonitrile at 110℃; for 4h; Heck Reaction;52%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

3-chloro-benzenecarboperoxoic acid
937-14-4

3-chloro-benzenecarboperoxoic acid

1-oxa-5-aza-spiro[2.3]hexane-5-carboxylic acid tert-butyl ester
934664-42-3

1-oxa-5-aza-spiro[2.3]hexane-5-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
In chloroform at 20℃; for 48h;51%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

1-oxa-5-aza-spiro[2.3]hexane-5-carboxylic acid tert-butyl ester
934664-42-3

1-oxa-5-aza-spiro[2.3]hexane-5-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With m-chloroperoxybenzoic acid In chloroform at 20℃; for 48h;51%
With 3-chloro-benzenecarboperoxoic acid In chloroform at 20℃; for 48h;51%
With 3-chloro-benzenecarboperoxoic acid In chloroform at 20℃; for 48h;51%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

2-bromo-N,N-diphenylbutanamide

2-bromo-N,N-diphenylbutanamide

tert-butyl (R)-3-(2-(diphenylcarbamoyl)butyl)azetidine-1-carboxylate

tert-butyl (R)-3-(2-(diphenylcarbamoyl)butyl)azetidine-1-carboxylate

Conditions
ConditionsYield
With 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; potassium fluoride; nickel(II) iodide monohydrate; diethoxymethylane; (S)-4-(4-fluorophenyl)-2-(6-methylpyridin-2-yl)-5,5-diphenyl-4,5-dihydrooxazole In 1,2-dichloro-ethane at -25℃; for 24h; Inert atmosphere; Sealed tube; enantioselective reaction;49%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

6-bromo-3,5-difluoro-1H-indazole

6-bromo-3,5-difluoro-1H-indazole

tert-butyl 3-((3,5-difluoro-1H-indazol-6-yl)methylene)azetidine-1-carboxylate

tert-butyl 3-((3,5-difluoro-1H-indazol-6-yl)methylene)azetidine-1-carboxylate

Conditions
ConditionsYield
With palladium diacetate; N-ethyl-N,N-diisopropylamine; tris-(o-tolyl)phosphine In N,N-dimethyl-formamide at 160℃; for 2h; Inert atmosphere; Microwave irradiation;48%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

(dimethyl(phenyl)silyl)zinc chloride
1234935-78-4

(dimethyl(phenyl)silyl)zinc chloride

benzoyl chloride
98-88-4

benzoyl chloride

C24H31NO3Si

C24H31NO3Si

Conditions
ConditionsYield
With nickel(II) bromide dimethoxyethane In tetrahydrofuran; acetonitrile at 0℃;48%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

6-bromo-3,3-difluoro-1,3-dihydro-2H-indol-2-one
1393532-37-0

6-bromo-3,3-difluoro-1,3-dihydro-2H-indol-2-one

tert-butyl 3-((3,3-difluoro-2-oxoindolin-6-yl)methylene)azetidine-1-carboxylate

tert-butyl 3-((3,3-difluoro-2-oxoindolin-6-yl)methylene)azetidine-1-carboxylate

Conditions
ConditionsYield
With palladium diacetate; N-ethyl-N,N-diisopropylamine; tris-(o-tolyl)phosphine In acetonitrile for 16h; Inert atmosphere;43.8%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-hydroxy-3-(hydroxymethyl)azetidine-1-carboxylate

tert-butyl 3-hydroxy-3-(hydroxymethyl)azetidine-1-carboxylate

Conditions
ConditionsYield
With potassium osmate(VI); 4-methylmorpholine N-oxide In water; acetone at 20℃; for 12h;42%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-(bromomethyl)-3-fluoroazetidine-1-carboxylate

tert-butyl 3-(bromomethyl)-3-fluoroazetidine-1-carboxylate

Conditions
ConditionsYield
With N-Bromosuccinimide; triethylamine tris(hydrogen fluoride) In dichloromethane at 5 - 20℃;41%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

ethyl 5-amino-2-bromo-6H-thieno[3,2-b]azepine-7-carboxylate

ethyl 5-amino-2-bromo-6H-thieno[3,2-b]azepine-7-carboxylate

ethyl 5-amino-2-[(1-tert-butoxycarbonylazetidin-3-yl)methyl]-6H-thieno[3,2-b]azepine-7-carboxylate

ethyl 5-amino-2-[(1-tert-butoxycarbonylazetidin-3-yl)methyl]-6H-thieno[3,2-b]azepine-7-carboxylate

Conditions
ConditionsYield
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran at 70℃; for 4h;
Stage #2: ethyl 5-amino-2-bromo-6H-thieno[3,2-b]azepine-7-carboxylate With tris-(dibenzylideneacetone)dipalladium(0); sodium carbonate; XPhos In tetrahydrofuran; 1,4-dioxane; water at 100℃; for 12h; Inert atmosphere;
37%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

6-bromo-4-methyl-7-trifluoromethyl-2-(2-trimethylsilanylethoxymethyl)-2,10-dihydro-9-oxa-1,2,4a-triazaphenanthren-3-one
1613719-81-5

6-bromo-4-methyl-7-trifluoromethyl-2-(2-trimethylsilanylethoxymethyl)-2,10-dihydro-9-oxa-1,2,4a-triazaphenanthren-3-one

3-[4-methyl-3-oxo-7-trifluoromethyl-2-(2-trimethylsilanylethoxymethyl)-2,3,4,10-tetrahydro-9-oxa-1,2,4a-triazaphenanthren-6-ylmethylene]azetidine-1-carboxylic acid tert-butyl ester
1613720-51-6

3-[4-methyl-3-oxo-7-trifluoromethyl-2-(2-trimethylsilanylethoxymethyl)-2,3,4,10-tetrahydro-9-oxa-1,2,4a-triazaphenanthren-6-ylmethylene]azetidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
With palladium diacetate; triethylamine; tris-(o-tolyl)phosphine In acetonitrile at 110℃; for 14h; Heck Reaction;20%
With palladium diacetate; triethylamine; tris-(o-tolyl)phosphine In acetonitrile at 110℃; for 14h;20%
3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

4-iodobenzoic acid ethyl ester
51934-41-9

4-iodobenzoic acid ethyl ester

tert-butyl 3-[(4-ethoxycarbonylphenyl)methyl]-azetidine-1-carboxylate

tert-butyl 3-[(4-ethoxycarbonylphenyl)methyl]-azetidine-1-carboxylate

Conditions
ConditionsYield
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran for 4h; Reflux;
Stage #2: 4-iodobenzoic acid ethyl ester With tris-(dibenzylideneacetone)dipalladium(0); sodium carbonate; XPhos In tetrahydrofuran; 1,4-dioxane; water Reflux;
20%
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran for 4h; Reflux;
Stage #2: 4-iodobenzoic acid ethyl ester With tris-(dibenzylideneacetone)dipalladium(0); sodium carbonate; XPhos In tetrahydrofuran; 1,4-dioxane; water Reflux;
200 mg
ethyl 5-bromothiophene-2-carboxylate
5751-83-7

ethyl 5-bromothiophene-2-carboxylate

3-methylene-azetidine-1-carboxylic acid tert-butyl ester
934664-41-2

3-methylene-azetidine-1-carboxylic acid tert-butyl ester

tert-butyl 3-[(5-ethoxycarbonyl-2-thienyl)methyl]azetidine-1-carboxylate

tert-butyl 3-[(5-ethoxycarbonyl-2-thienyl)methyl]azetidine-1-carboxylate

Conditions
ConditionsYield
Stage #1: 3-methylene-azetidine-1-carboxylic acid tert-butyl ester With 9-bora-bicyclo[3.3.1]nonane In tetrahydrofuran for 4h; Reflux;
Stage #2: ethyl 5-bromothiophene-2-carboxylate With tris-(dibenzylideneacetone)dipalladium(0); sodium carbonate; XPhos In tetrahydrofuran; 1,4-dioxane; water Reflux;
20%

934664-41-2Relevant articles and documents

Synthesis of sp 3-Enriched β-Fluoro Sulfonyl Chlorides

Gurbanov, Rustam,Sokolov, Andriy,Golovach, Sergey,Melnykov, Kostiantyn,Dobrydnev, Alexey V.,Grygorenko, Oleksandr O.

, p. 1771 - 1784 (2020/12/28)

A three-step approach to the synthesis of sp 3-enriched β-fluoro sulfonyl chlorides starting from alkenes is reported. The method was successfully applied to a wide range of acyclic and cyclic substrates, bearing either an exocyclic or an endocyclic double bond. The procedure worked with a wide range of substrates and tolerated a number of functional and protecting groups. Moreover, the target cyclic compounds were obtained as single cis diastereomers on a multigram scale. The title compounds are promising building blocks for drug discovery that can be used to obtain sp 3-enriched β-fluoro and α,β-unsaturated sulfonamides.

CHEMICAL COMPOUNDS

-

Paragraph 0191-0193, (2021/04/02)

The present disclosure describes novel compounds, or their pharmaceutically acceptable salts, pharmaceutical compositions containing them, and their medical uses. The compounds of the disclosure have activity as Janus kinase (JAK) inhibitors and are useful in the treatment or control of inflammation, auto-immune diseases, cancer, and other disorders and indications where modulation of JAK would be desirable. Also described herein are methods of treating inflammation, auto-immune diseases, cancer, and other conditions susceptible to inhibition of JAK by administering a compound herein described.

Hydrophilic azaspiroalkenes as robust bioorthogonal reporters

An, Peng,Wu, Hsuan-Yi,Lewandowski, Tracey M.,Lin, Qing

supporting information, p. 14005 - 14008 (2019/01/03)

Two hydrophilic spiroalkenes, azaspiro[2.3]hex-1-ene and azaspiro[2.4]hept-1-ene, were designed and synthesized. Compared to the previously reported spiro[2.3]hex-1-ene, the azaspiroalkenes exhibited greater water solubility and reactivity as dipolarophiles in the photoinduced tetrazole-alkene cycloaddition reaction. In addition, an azaspiro[2.3]hex-1-ene-containing amino acid, AsphK, was found to be charged by an engineered pyrrolysyl-tRNA synthetase into proteins via amber codon suppression in E. coli as well as in mammalian cells.

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