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  • N,N'-Disuccinimidyl carbonate DSC CAS 74124-79-1 Di(succinimido) carbonate CAS no 74124-79-1 DSC

    Cas No: 74124-79-1

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74124-79-1 Usage

Chemical Properties

N,N'-Disuccinimidyl carbonate is white to slightly yellow crystalline powder

Uses

Different sources of media describe the Uses of 74124-79-1 differently. You can refer to the following data:
1. N,N’Disuccinimidyl Carbonate is a commonly used reagent for the preparation of N-succinimidyl esters of N-protected amino acids, activated carbonate, synthesis of urea, carbamates and coupling of lig ands to proteins. The coupling reagent property of N,N’Disuucinimidyl Carbonate speeds up coupling process, while reduces the loss of chiral integrity.
2. N,N'-Disuccinimidyl carbonate is a convenient reagent for the synthesis of N-succinimidyl esters of N-protected amino acids.
3. N,N'-Disuccinimidyl carbonate is used to prepare cleavable linker succinimide vinylsufonylethyl carbonate for thiol modified-DNA. It serves as a reagent for the synthesis of carbamates. Further, it is used as a coupling reagent as well as in the preparation of N-succinimidyl esters of N-protected amino acids, activated carbonate and coupling of ligand to proteins.

Synthesis Reference(s)

Tetrahedron Letters, 20, p. 4745, 1979 DOI: 10.1016/S0040-4039(01)86699-5

General Description

N,N′-Disuccinimidyl carbonate is used for the HPLC determination of amino compounds.

Check Digit Verification of cas no

The CAS Registry Mumber 74124-79-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,1,2 and 4 respectively; the second part has 2 digits, 7 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 74124-79:
(7*7)+(6*4)+(5*1)+(4*2)+(3*4)+(2*7)+(1*9)=121
121 % 10 = 1
So 74124-79-1 is a valid CAS Registry Number.

74124-79-1 Well-known Company Product Price

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  • TCI America

  • (D1662)  Di(N-succinimidyl) Carbonate  >98.0%(T)

  • 74124-79-1

  • 5g

  • 585.00CNY

  • Detail
  • TCI America

  • (D1662)  Di(N-succinimidyl) Carbonate  >98.0%(T)

  • 74124-79-1

  • 25g

  • 1,820.00CNY

  • Detail
  • Alfa Aesar

  • (H26629)  N,N'-Disuccinimidyl carbonate, tech. 85%, remainder N-Hydroxysuccinimide   

  • 74124-79-1

  • 1g

  • 277.0CNY

  • Detail
  • Alfa Aesar

  • (H26629)  N,N'-Disuccinimidyl carbonate, tech. 85%, remainder N-Hydroxysuccinimide   

  • 74124-79-1

  • 5g

  • 893.0CNY

  • Detail
  • Alfa Aesar

  • (H26629)  N,N'-Disuccinimidyl carbonate, tech. 85%, remainder N-Hydroxysuccinimide   

  • 74124-79-1

  • 25g

  • 1858.0CNY

  • Detail
  • Aldrich

  • (225827)  N,N′-Disuccinimidylcarbonate  ≥95%

  • 74124-79-1

  • 225827-1G

  • 410.67CNY

  • Detail
  • Aldrich

  • (225827)  N,N′-Disuccinimidylcarbonate  ≥95%

  • 74124-79-1

  • 225827-5G

  • 1,347.84CNY

  • Detail
  • Aldrich

  • (225827)  N,N′-Disuccinimidylcarbonate  ≥95%

  • 74124-79-1

  • 225827-25G

  • 4,713.93CNY

  • Detail
  • Sigma-Aldrich

  • (43720)  N,N′-Disuccinimidylcarbonate  purum, ≥95.0% (NMR)

  • 74124-79-1

  • 43720-5G

  • 1,646.19CNY

  • Detail
  • Sigma-Aldrich

  • (43720)  N,N′-Disuccinimidylcarbonate  purum, ≥95.0% (NMR)

  • 74124-79-1

  • 43720-25G

  • 5,359.77CNY

  • Detail

74124-79-1SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name N,N'-Disuccinimidyl carbonate

1.2 Other means of identification

Product number -
Other names bis(2,5-dioxopyrrolidin-1-yl) carbonate

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

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More Details:74124-79-1 SDS

74124-79-1Synthetic route

1-hydroxy-pyrrolidine-2,5-dione
6066-82-6

1-hydroxy-pyrrolidine-2,5-dione

bis(trichloromethyl) carbonate
32315-10-9

bis(trichloromethyl) carbonate

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In dichloromethane 1.) 0 deg C, 3 h, 2.) 0-20 deg C, 6 h, 3.) reflux, 2 h;94%
With tributyl-amine In tetrahydrofuran for 14h; Ambient temperature;89%
With Pinene In tetrahydrofuran for 12h; Heating;76%
1-hydroxy-pyrrolidine-2,5-dione
6066-82-6

1-hydroxy-pyrrolidine-2,5-dione

trichloromethyl chloroformate
503-38-8

trichloromethyl chloroformate

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

Conditions
ConditionsYield
80%
1-hydroxy-pyrrolidine-2,5-dione
6066-82-6

1-hydroxy-pyrrolidine-2,5-dione

(fluorenylmethoxy)carbonyl chloride
28920-43-6

(fluorenylmethoxy)carbonyl chloride

A

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

B

9-fluorenylmethyl N-succinimidyl carbonate
102774-86-7

9-fluorenylmethyl N-succinimidyl carbonate

Conditions
ConditionsYield
With tributyl-amine In tetrahydrofuran at -2 - 5℃; Temperature; Large scale;A 95 kg
B 119 kg
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

4-(benzyloxycarbonylamino)butyric acid
5105-78-2

4-(benzyloxycarbonylamino)butyric acid

N-hydroxysuccinimide ester of 4-<(carbobenzyloxy)amino>butyric acid
60722-88-5

N-hydroxysuccinimide ester of 4-<(carbobenzyloxy)amino>butyric acid

Conditions
ConditionsYield
With pyridine100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

Boc-Lys(Boc)-OH
2483-46-7

Boc-Lys(Boc)-OH

N,N'-di-t-butyloxycarbonyl-(S)-lysine N-hydroxysuccinimide ester
30189-36-7

N,N'-di-t-butyloxycarbonyl-(S)-lysine N-hydroxysuccinimide ester

Conditions
ConditionsYield
With pyridine100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

(S)-3-hydroxytetyrahydrofurane
86087-23-2

(S)-3-hydroxytetyrahydrofurane

1-({[(3S)-tetrahydro-3-furanyloxy]carbonyl}oxy)-2,5-pyrrolidinedione
138499-08-8

1-({[(3S)-tetrahydro-3-furanyloxy]carbonyl}oxy)-2,5-pyrrolidinedione

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃; for 18h;100%
With triethylamine In acetonitrile at 20℃; for 18h;100%
With triethylamine In acetonitrile at 20℃; for 21.5h;94%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

2-(2-tert-butyloxycarbonylaminoethoxy)ethanol
139115-91-6

2-(2-tert-butyloxycarbonylaminoethoxy)ethanol

tert-butyl (2-(2-((((2,5-dioxopyrrolidin-1-yl)oxy)carbonyl)oxy)ethoxy)ethyl)carbamate
261364-63-0

tert-butyl (2-(2-((((2,5-dioxopyrrolidin-1-yl)oxy)carbonyl)oxy)ethoxy)ethyl)carbamate

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃; for 2h;100%
With pyridine In chloroform at 25 - 30℃; Acylation;96%
With triethylamine In acetonitrile at 40℃; for 1h;70%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

1,12-dodecanedioic acid
693-23-2

1,12-dodecanedioic acid

dodecanedioic acid bis(2,5-dioxopyrrolidin-1-yl) ester
75472-90-1

dodecanedioic acid bis(2,5-dioxopyrrolidin-1-yl) ester

Conditions
ConditionsYield
With pyridine In acetonitrile at 20℃; for 7h;100%
With pyridine In acetonitrile at 20℃; for 7h; Inert atmosphere;100%
With pyridine In acetonitrile at 20℃; for 3h;90%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

cyclohexylmethyl alcohol
100-49-2

cyclohexylmethyl alcohol

N-succinimidyl carbonic acid cyclohexylmethyl ester
922723-33-9

N-succinimidyl carbonic acid cyclohexylmethyl ester

Conditions
ConditionsYield
With triethylamine In dichloromethane at 20℃;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

benzyl (4S)-4-(2,5-dioxopyrrolidin-1-yloxycarbonylamino)azepane-1-carboxylate
1017575-24-4

benzyl (4S)-4-(2,5-dioxopyrrolidin-1-yloxycarbonylamino)azepane-1-carboxylate

Conditions
ConditionsYield
Stage #1: C5H7NO3*C14H20N2O2 With triethylamine In acetonitrile at 5℃;
Stage #2: di(succinimido) carbonate In acetonitrile at 2 - 2.5℃; for 0.833333h;
100%
4-(3-Aminopropyl)morpholine
123-00-2

4-(3-Aminopropyl)morpholine

C17H17F3O3
938455-56-2

C17H17F3O3

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C25H31F3N2O5

C25H31F3N2O5

Conditions
ConditionsYield
Stage #1: C17H17F3O3; di(succinimido) carbonate With triethylamine In acetonitrile at 20℃; for 1h;
Stage #2: 4-(3-Aminopropyl)morpholine In acetonitrile at 20℃; for 0.25h; Further stages.;
100%
(2-aminomethylpyridine)
3731-51-9

(2-aminomethylpyridine)

C17H17F3O3
938455-56-2

C17H17F3O3

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C24H23F3N2O4

C24H23F3N2O4

Conditions
ConditionsYield
Stage #1: C17H17F3O3; di(succinimido) carbonate With triethylamine In acetonitrile at 20℃; for 1h;
Stage #2: 2-(Aminomethyl)pyridine In acetonitrile at 20℃; for 0.25h; Further stages.;
100%
methyl (2R,3S)-2-amino-3-(1H-indol-3-yl)butanoate
214770-65-7

methyl (2R,3S)-2-amino-3-(1H-indol-3-yl)butanoate

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

4-phenylpiperidine hydrochloride
10272-49-8

4-phenylpiperidine hydrochloride

methyl (2R,3S)-3-(1H-indol-3-yl)-2-[((4-phenyl-piperidine)carbonyl)-amino]butanoate

methyl (2R,3S)-3-(1H-indol-3-yl)-2-[((4-phenyl-piperidine)carbonyl)-amino]butanoate

Conditions
ConditionsYield
With 1,8-diazabicyclo[5.4.0]undec-7-ene; N-ethyl-N,N-diisopropylamine In acetonitrile at 0 - 20℃; for 17h;100%
C29H33N2O8S2(1-)*H(1+)

C29H33N2O8S2(1-)*H(1+)

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C33H36N3O10S2(1-)*H(1+)

C33H36N3O10S2(1-)*H(1+)

Conditions
ConditionsYield
With pyridine In N,N-dimethyl-formamide at 55 - 60℃; for 1.5h;100%
PCD680H COONa

PCD680H COONa

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

PCD680H NHS

PCD680H NHS

Conditions
ConditionsYield
In dimethyl sulfoxide at 55℃;100%
4-chloro-N-(2,5-difluorophenyl)-N-(rac-2-hydroxy-1-methylethyl)benzenesulfonamide

4-chloro-N-(2,5-difluorophenyl)-N-(rac-2-hydroxy-1-methylethyl)benzenesulfonamide

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

carbonic acid rac-2-{[(4-chlorophenyl)sulfonyl]-(2,5-difluorophenyl)amino}-propyl ester 2,5-dioxopyrrolidin-1-yl ester

carbonic acid rac-2-{[(4-chlorophenyl)sulfonyl]-(2,5-difluorophenyl)amino}-propyl ester 2,5-dioxopyrrolidin-1-yl ester

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In acetonitrile at 20℃; for 3h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

6-(trifluoroacetamido)hexanoic acid
407-91-0

6-(trifluoroacetamido)hexanoic acid

N-ε-trifluoroacetylaminohexanoic acid N-hydroxysuccinimide ester
117032-51-6

N-ε-trifluoroacetylaminohexanoic acid N-hydroxysuccinimide ester

Conditions
ConditionsYield
With pyridine In acetonitrile at 20℃; for 13h;100%
acetic acid 2-(2-hydroxyethyldithio)ethyl ester
877864-03-4

acetic acid 2-(2-hydroxyethyldithio)ethyl ester

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C11H15NO7S2

C11H15NO7S2

Conditions
ConditionsYield
100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

(3R,4R)-3-(tert-butyldimethylsilanyloxymethyl)-4-(2-aminophenylamino)piperidine-1-carboxylic acid tert-butyl ester
1019207-66-9

(3R,4R)-3-(tert-butyldimethylsilanyloxymethyl)-4-(2-aminophenylamino)piperidine-1-carboxylic acid tert-butyl ester

(3R,4R)-3-(tert-butyldimethylsilanyloxymethyl)-4-(2-oxo-2,3-dihydrobenzimidazol-1-yl)piperidine-1-carboxylic acid tert-butyl ester
1019207-63-6

(3R,4R)-3-(tert-butyldimethylsilanyloxymethyl)-4-(2-oxo-2,3-dihydrobenzimidazol-1-yl)piperidine-1-carboxylic acid tert-butyl ester

Conditions
ConditionsYield
In N,N-dimethyl-formamide at 20℃; for 48h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C2HF3O2*C33H51N7O12S2
1069066-95-0

C2HF3O2*C33H51N7O12S2

C38H54N8O16S2
1069066-85-8

C38H54N8O16S2

Conditions
ConditionsYield
With triethylamine In N,N-dimethyl-formamide at 20℃; for 2h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

6-(9-hydroxy-3-methoxy-9-(4-methoxyphenyl)-9H-xanthen-6-yl)hex-5-ynoic acid
1105506-46-4

6-(9-hydroxy-3-methoxy-9-(4-methoxyphenyl)-9H-xanthen-6-yl)hex-5-ynoic acid

6-(9-hydroxy-3-methoxy-9-(4-methoxyphenyl)-9H-xanthen-6-yl)hex-5-ynoate-N-hydroxysuccinimide
1105506-47-5

6-(9-hydroxy-3-methoxy-9-(4-methoxyphenyl)-9H-xanthen-6-yl)hex-5-ynoate-N-hydroxysuccinimide

Conditions
ConditionsYield
With triethylamine In dichloromethane at 20℃;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

2-[(tert-butyldiphenylsilyl)oxy]ethanol
138499-16-8

2-[(tert-butyldiphenylsilyl)oxy]ethanol

C23H27NO6Si
1364788-77-1

C23H27NO6Si

Conditions
ConditionsYield
With pyridine In acetonitrile at 22℃;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

Cyclopropylmethanol
2516-33-8

Cyclopropylmethanol

cyclopropylmethyl 2,5-dioxopyrrolidin-1-yl carbonate
959425-11-7

cyclopropylmethyl 2,5-dioxopyrrolidin-1-yl carbonate

Conditions
ConditionsYield
With triethylamine In acetonitrile100%
With triethylamine In acetonitrile100%
With pyridine In acetonitrile at 40℃; for 4h;99%
With triethylamine In acetonitrile
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

C16H27N3O5
395645-69-9

C16H27N3O5

C21H30N4O9
1364788-93-1

C21H30N4O9

Conditions
ConditionsYield
With pyridine In acetonitrile at 22℃; Inert atmosphere;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

3,5-dimethoxybenzyl alcohol
705-76-0

3,5-dimethoxybenzyl alcohol

3,5-dimethoxybenzyl-N-succinimidyl carbonate
1383617-02-4

3,5-dimethoxybenzyl-N-succinimidyl carbonate

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃; for 0.333333h; Inert atmosphere;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

5-(diisopropyloxyphosphoryl)-5-methyl-4-hydroxymethyl-1-pyrroline N-oxide

5-(diisopropyloxyphosphoryl)-5-methyl-4-hydroxymethyl-1-pyrroline N-oxide

(4R*,5R*)-5-diisopropyloxyphosphoryl-5-methyl-4-(succinimidyloxycarbonyloxymethyl)-1-pyrroline N-oxide

(4R*,5R*)-5-diisopropyloxyphosphoryl-5-methyl-4-(succinimidyloxycarbonyloxymethyl)-1-pyrroline N-oxide

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃;100%
lauric acid
143-07-7

lauric acid

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

N-succinimidyl laurate
14565-47-0

N-succinimidyl laurate

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 40℃; for 1h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

Arachidic acid
506-30-9

Arachidic acid

N-(eicosanoyloxy)succinimide
69888-87-5

N-(eicosanoyloxy)succinimide

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In N,N-dimethyl-formamide at 40℃; for 1h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)ethan-1-ol

2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)ethan-1-ol

2,5-dioxopyrrolidin-1-yl (4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenethyl) carbonate

2,5-dioxopyrrolidin-1-yl (4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenethyl) carbonate

Conditions
ConditionsYield
With pyridine In acetonitrile at 20℃; for 4h;100%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

methyl (phenyl 5-amino-8-O-tert-butyldimethylsilyl-5-N,4-O-carbonyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid)onate

methyl (phenyl 5-amino-8-O-tert-butyldimethylsilyl-5-N,4-O-carbonyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid)onate

methyl (phenyl 5-amino-8-O-tert-butyldimethylsilyl-5-N,4-O-carbonyl-7-O,9-O-carbonyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid)onate

methyl (phenyl 5-amino-8-O-tert-butyldimethylsilyl-5-N,4-O-carbonyl-7-O,9-O-carbonyl-3,5-dideoxy-2-thio-D-glycero-β-D-galacto-2-nonulopyranosid)onate

Conditions
ConditionsYield
With dmap In dichloromethane at 0 - 20℃; for 4h;100%
4-(5,5-difluoro-1,3,7,9-tetramethyl-5H-4λ4,5λ4-dipyrrolo[1,2-c:2’,1’-f][1,3,2]diazaborinin-10-yl)butanoic acid

4-(5,5-difluoro-1,3,7,9-tetramethyl-5H-4λ4,5λ4-dipyrrolo[1,2-c:2’,1’-f][1,3,2]diazaborinin-10-yl)butanoic acid

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

10-(4-((2,5-dioxopyrrolidin-1-yl)oxy)-4-oxobutyl)-5,5-difluoro-1,3,7,9-tetramethyl-5H-dipyrrolo[1,2-c:2 ′,1 ′-f ][1,3,2]diazaborinin-4-ium-5-uide

10-(4-((2,5-dioxopyrrolidin-1-yl)oxy)-4-oxobutyl)-5,5-difluoro-1,3,7,9-tetramethyl-5H-dipyrrolo[1,2-c:2 ′,1 ′-f ][1,3,2]diazaborinin-4-ium-5-uide

Conditions
ConditionsYield
With triethylamine In tetrahydrofuran at 20℃; Inert atmosphere;99.9%
5-(3-tert-butyldimethylsilyloxyphenyl)-4-(7-carboxy-1,1-dimethyl-3-oxaheptyl)-3,3-dimethyl-2,3-dihydrofuran
594859-92-4

5-(3-tert-butyldimethylsilyloxyphenyl)-4-(7-carboxy-1,1-dimethyl-3-oxaheptyl)-3,3-dimethyl-2,3-dihydrofuran

di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

5-(3-tert-butyldimethylsilyloxyphenyl)-4-(7-carboxy-1,1-dimethyl-3-oxaheptyl)-3,3-dimethyl-2,3-dihydrofuran N-hydroxysuccinimide ester
594859-93-5

5-(3-tert-butyldimethylsilyloxyphenyl)-4-(7-carboxy-1,1-dimethyl-3-oxaheptyl)-3,3-dimethyl-2,3-dihydrofuran N-hydroxysuccinimide ester

Conditions
ConditionsYield
With triethylamine In acetonitrile at 20℃; for 1h; Inert atmosphere;99.8%
di(succinimido) carbonate
74124-79-1

di(succinimido) carbonate

N-tert-butoxycarbonyl-3-aminopropanol
58885-58-8

N-tert-butoxycarbonyl-3-aminopropanol

3-(tert-butoxycarbonylamino)propyl N-hydroxysuccinimidyl carbonate
613666-84-5

3-(tert-butoxycarbonylamino)propyl N-hydroxysuccinimidyl carbonate

Conditions
ConditionsYield
With triethylamine at 20℃; for 2h;99%
With triethylamine In acetonitrile at 0℃; for 3h; Inert atmosphere;80%

74124-79-1Relevant articles and documents

Improved synthesis of N,N′-disuccinimidyl carbonate using α-pinene as acid scavenger

Prasad, Maddipati,Nowshuddin, Shaik,Rao

, p. 3119 - 3121 (2005)

An improved synthesis of N,N′-disuccinimidyl carbonate (DSC) is described where α-pinene is utilized as an efficient scavenger of HCl liberated during the reaction of N-hydroxysuccinimide with triphosgene in THF. The α-pinene hydrochloride formed is soluble in THF and gives very pure DSC in good yields. Copyright Taylor & Francis, Inc.

Ogura et al.

, p. 4745 (1979)

Modified protease having 5 to 13 covalently coupled polymeric molecules for skin care

-

, (2008/06/13)

Modified enzymes are prepared for use in skin care products by covalently coupling to the enzymes from 4 to 70 polymeric molecules with or without a linker such as a triazine ring. Molecular weight of the polymeric molecules may be from 1 to 35 kDa and of the enzymes from 15 to 100 kDa. The number and weight of polymeric molecules coupled is balanced with the weight and/or surface area of the enzymes. Enzymes include proteases such as subtilisins, lipases and oxidoreductases such as laccases and superoxide dismutase, and polymeric molecules include polysaccharides such as dextran or pullulan and polyalkylene oxides such as polyethylene glycol. The polymeric molecules may be coupled to the enzymes at the N-terminal amino group and/or lysine residues, and preferably at a position more than 5 ? from the active site of the enzymes. A preferred modified enzyme is a protease having from 5 to 13 coupled polymeric molecules. Skin care products containing the modified enzymes have improved stability and reduced allergenicity as compared to the products containing the unmodified enzymes.

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