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430-67-1 Usage

Chemical Properties

Liquid

Check Digit Verification of cas no

The CAS Registry Mumber 430-67-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,3 and 0 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 430-67:
(5*4)+(4*3)+(3*0)+(2*6)+(1*7)=51
51 % 10 = 1
So 430-67-1 is a valid CAS Registry Number.
InChI:InChI=1/C2H5F2N/c3-2(4)1-5/h2H,1,5H2

430-67-1 Well-known Company Product Price

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  • (Code)Product description
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  • TCI America

  • (D4758)  2,2-Difluoroethylamine  >98.0%(GC)(T)

  • 430-67-1

  • 1g

  • 580.00CNY

  • Detail
  • TCI America

  • (D4758)  2,2-Difluoroethylamine  >98.0%(GC)(T)

  • 430-67-1

  • 5g

  • 1,890.00CNY

  • Detail

430-67-1Synthetic route

1-chloro-2,2-difluoroethane
338-65-8

1-chloro-2,2-difluoroethane

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

Conditions
ConditionsYield
With ammonium hydroxide at 160℃; under 22502.3 Torr; for 2h; Temperature; Pressure; Large scale;90%
With ammonia; potassium iodide In 1-Methylpyrrolidine at 143 - 145℃; for 5.5h; Product distribution / selectivity; Autoclave;88%
With ammonium hydroxide; 18-crown-6 ether; potassium iodide In dimethyl sulfoxide Autoclave;79%
N-benzyl-2,2-difluoroethanamine
1184224-96-1

N-benzyl-2,2-difluoroethanamine

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

Conditions
ConditionsYield
With hydrogen; 5%-palladium/activated carbon In toluene at 80℃; under 4500.45 Torr; for 10h; Inert atmosphere;84%
2-bromo-1,1-difluoroethane
359-07-9

2-bromo-1,1-difluoroethane

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

Conditions
ConditionsYield
With ammonia; potassium iodide In dimethyl sulfoxide at 100℃; for 1h; Product distribution / selectivity; Autoclave;82%
With ammonia; water at 125℃;
With ammonia In neat (no solvent) at 160℃; Temperature;
N-(2,2-difluoroethyl)prop-2-en-1-amine
1178819-40-3

N-(2,2-difluoroethyl)prop-2-en-1-amine

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

Conditions
ConditionsYield
With ethanolamine; palladium 10% on activated carbon at 90℃;68%
2,2-difluoroacetamide
359-38-6

2,2-difluoroacetamide

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

Conditions
ConditionsYield
With sodium tetrahydroborate; boron trifluoride diethyl etherate60%
2-bromo-1,1-difluoroethane
359-07-9

2-bromo-1,1-difluoroethane

A

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

B

bis-(2,2-difluoro-ethyl)-amine
462-89-5

bis-(2,2-difluoro-ethyl)-amine

Conditions
ConditionsYield
With ethanol; ammonia at 125 - 145℃;
(1R,2S,3R,4S)-3-(2,2-Difluoro-ethylcarbamoyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid
93630-44-5

(1R,2S,3R,4S)-3-(2,2-Difluoro-ethylcarbamoyl)-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid

A

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

B

3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride
129-64-6

3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride

Conditions
ConditionsYield
With water at 38℃; Rate constant;
(1R,7S)-5-(2,2-Difluoro-ethylamino)-5-hydroxy-4-oxa-tricyclo[5.2.1.02,6]dec-8-en-3-one

(1R,7S)-5-(2,2-Difluoro-ethylamino)-5-hydroxy-4-oxa-tricyclo[5.2.1.02,6]dec-8-en-3-one

A

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

B

3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride
129-64-6

3,6-endomethylene-1,2,3,6-tetrahydrophthalic anhydride

Conditions
ConditionsYield
With water at 38℃; Rate constant;
methanesulfonic acid 2-[3-(tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-phenyl]-ethyl ester
946000-58-4

methanesulfonic acid 2-[3-(tert-butyl-dimethyl-silanyloxymethyl)-4-chloro-phenyl]-ethyl ester

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

C17H28ClF2NOSi

C17H28ClF2NOSi

Conditions
ConditionsYield
In ethanol at 60℃;100%
In ethanol at 60℃;
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2-methylchlorobenzene
95-49-8

2-methylchlorobenzene

N-(2,2-difluoro-ethyl)-o-toluidine
2366-95-2

N-(2,2-difluoro-ethyl)-o-toluidine

Conditions
ConditionsYield
With bis(η3-allyl-μ-chloropalladium(II)); 5-(di(adamantan-1-yl)phosphino)-1′,3′,5′-triphenyl-1′H-1,4′-bipyrazole; potassium phenolate In 1,4-dioxane at 100℃; for 6h; Sealed tube; Inert atmosphere;99%
With copper(I) oxide; copper
1-bromo-4-methoxy-benzene
104-92-7

1-bromo-4-methoxy-benzene

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

N-(2,2-difluoroethyl)-4-methoxyaniline

N-(2,2-difluoroethyl)-4-methoxyaniline

Conditions
ConditionsYield
With bis(η3-allyl-μ-chloropalladium(II)); 5-(di(adamantan-1-yl)phosphino)-1′,3′,5′-triphenyl-1′H-1,4′-bipyrazole; potassium phenolate In 1,4-dioxane at 100℃; for 6h; Sealed tube; Inert atmosphere;99%
With copper(I) oxide; C19H24N2O7; potassium carbonate In methanol at 100℃; for 24h; Ullmann Condensation;93%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-(vinylsulfonyl)-2-methylbenzene
5535-54-6

1-(vinylsulfonyl)-2-methylbenzene

5-(difluoromethyl)-3-(o-tolylsulfonyl)-4,5-dihydro-1H-pyrazole

5-(difluoromethyl)-3-(o-tolylsulfonyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; 1-(vinylsulfonyl)-2-methylbenzene With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
99%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

ethyl vinyl sulfone
1889-59-4

ethyl vinyl sulfone

3-(ethylsulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

3-(ethylsulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; ethyl vinyl sulfone With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
99%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-(vinylsulfonyl)-3-methylbenzene
5535-53-5

1-(vinylsulfonyl)-3-methylbenzene

3-((3-methylphenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

3-((3-methylphenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; 1-(vinylsulfonyl)-3-methylbenzene With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
99%
tert.-butylnitrite
540-80-7

tert.-butylnitrite

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-fluoro-2-(2-nitro-vinyl)-benzene
399-25-7

1-fluoro-2-(2-nitro-vinyl)-benzene

N-(2,2-difluoroethyl)-N-(1-(2-fluorophenyl)-2-nitroethyl)nitrous amide

N-(2,2-difluoroethyl)-N-(1-(2-fluorophenyl)-2-nitroethyl)nitrous amide

Conditions
ConditionsYield
With acetic acid at 20℃; for 6h;99%
tert.-butylnitrite
540-80-7

tert.-butylnitrite

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-chloro-2-(2-nitrovinyl)benzene
22568-07-6, 3156-34-1

1-chloro-2-(2-nitrovinyl)benzene

N-(1-(2-chlorophenyl)-2-nitroethyl)-N-(2,2-difluoroethyl)nitrous amide

N-(1-(2-chlorophenyl)-2-nitroethyl)-N-(2,2-difluoroethyl)nitrous amide

Conditions
ConditionsYield
With acetic acid at 20℃; for 6h;99%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-fluoro-2-(2-nitro-vinyl)-benzene
399-25-7

1-fluoro-2-(2-nitro-vinyl)-benzene

N-(2,2-difluoroethyl)-N-(1-(2-fluorophenyl)-2-nitroethyl)nitrous amide

N-(2,2-difluoroethyl)-N-(1-(2-fluorophenyl)-2-nitroethyl)nitrous amide

Conditions
ConditionsYield
With tert.-butylnitrite; acetic acid at 20℃; for 3h; Michael Addition;99%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-chloro-2-(2-nitrovinyl)benzene
22568-07-6, 3156-34-1

1-chloro-2-(2-nitrovinyl)benzene

N-(1-(2-chlorophenyl)-2-nitroethyl)-N-(2,2-difluoroethyl)nitrous amide

N-(1-(2-chlorophenyl)-2-nitroethyl)-N-(2,2-difluoroethyl)nitrous amide

Conditions
ConditionsYield
With tert.-butylnitrite; acetic acid at 20℃; for 3h; Michael Addition;99%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

methyl N-cyanoacetimidate
5652-84-6

methyl N-cyanoacetimidate

N'-cyano-N-(2,2-difluoroethyl)ethanimidamide
1003859-01-5

N'-cyano-N-(2,2-difluoroethyl)ethanimidamide

Conditions
ConditionsYield
In methanol at 20℃; for 3h;98%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

5-(3-(bicyclo[1.1.1]pentan-1-ylcarbamoyl)phenyl)-6-chloro-2-(4-fluorophenyl)-N-methylfuro[2,3-b]pyridine-3-carboxamide

5-(3-(bicyclo[1.1.1]pentan-1-ylcarbamoyl)phenyl)-6-chloro-2-(4-fluorophenyl)-N-methylfuro[2,3-b]pyridine-3-carboxamide

5-(3-(bicyclo[1.1.1]pentan-1-ylcarbamoyl)phenyl)-6-((2,2-difluoroethyl)amino)-2-(4-fluorophenyl)-N-methylfuro[2,3-b]pyridine-3-carboxamide

5-(3-(bicyclo[1.1.1]pentan-1-ylcarbamoyl)phenyl)-6-((2,2-difluoroethyl)amino)-2-(4-fluorophenyl)-N-methylfuro[2,3-b]pyridine-3-carboxamide

Conditions
ConditionsYield
With chloro[2-(dicyclohexylphosphino)-3 ,6-dimethoxy-2’,4’, 6’-triisopropyl- 1,1’-biphenyl] [2-(2-aminoethyl)phenyl]palladium(II); sodium tert-pentoxide In 1,4-dioxane at 90℃; for 0.25h;98%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

((vinylsulfonyl)methyl)benzene
15753-89-6

((vinylsulfonyl)methyl)benzene

3-(benzylsulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

3-(benzylsulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; ((vinylsulfonyl)methyl)benzene With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
98%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

(E)-(4-nitrobut-3-enyl)benzene
80922-14-1

(E)-(4-nitrobut-3-enyl)benzene

N-(2,2-difluoroethyl)-N-(1-nitro-4-phenylbutan-2-yl)nitrous amide

N-(2,2-difluoroethyl)-N-(1-nitro-4-phenylbutan-2-yl)nitrous amide

Conditions
ConditionsYield
With tert.-butylnitrite; acetic acid at 20℃; for 36h; Michael Addition;98%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2-methyl-1-(2,6,8-trichloropyrimido[5,4-d]pyrimidin-4-ylamino)propan-2-ol

2-methyl-1-(2,6,8-trichloropyrimido[5,4-d]pyrimidin-4-ylamino)propan-2-ol

1-[2,6-dichloro-8-(2,2-difluoroethylamino)pyrimido[5,4-d]pyrimidin-4-ylamino]-2-methylpropan-2-ol

1-[2,6-dichloro-8-(2,2-difluoroethylamino)pyrimido[5,4-d]pyrimidin-4-ylamino]-2-methylpropan-2-ol

Conditions
ConditionsYield
In tetrahydrofuran97%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

1-(vinylsulfonyl)-4-fluorobenzene
28122-14-7

1-(vinylsulfonyl)-4-fluorobenzene

3-((4-fluorophenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

3-((4-fluorophenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; 1-(vinylsulfonyl)-4-fluorobenzene With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
97%
1,4-dihydro-5,8-dimethoxy-1,4-epoxynaphthalene
26002-73-3

1,4-dihydro-5,8-dimethoxy-1,4-epoxynaphthalene

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

rac-(1R,2R)-5,8-dimethoxy-2-((2,2,2-trifluoroethyl)amino)-1,2-dihydronaphthalen-1-ol

rac-(1R,2R)-5,8-dimethoxy-2-((2,2,2-trifluoroethyl)amino)-1,2-dihydronaphthalen-1-ol

Conditions
ConditionsYield
With bis(1,5-cyclooctadiene)diiridium(I) dichloride; tetra-(n-butyl)ammonium iodide In 1,4-dioxane; water at 80℃; for 0.333333h; Inert atmosphere; Green chemistry; regioselective reaction;97%
1,4-dihydronaphthalene-1,4-epoxide
573-57-9

1,4-dihydronaphthalene-1,4-epoxide

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

rac-(1R,2R)-2-((2,2-difluoroethyl)amino)-1,2-dihydronaphthalen-1-ol

rac-(1R,2R)-2-((2,2-difluoroethyl)amino)-1,2-dihydronaphthalen-1-ol

Conditions
ConditionsYield
With bis(1,5-cyclooctadiene)diiridium(I) dichloride; tetra-(n-butyl)ammonium iodide In 1,4-dioxane; water at 80℃; for 0.333333h; Inert atmosphere; Green chemistry; regioselective reaction;96%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

para-chloroacetophenone
99-91-2

para-chloroacetophenone

1-(4-((2,2-difluoroethyl)amino)phenyl)ethan-1-one

1-(4-((2,2-difluoroethyl)amino)phenyl)ethan-1-one

Conditions
ConditionsYield
With C33H43ClNiO6P2; sodium triflate; 1,8-diazabicyclo[5.4.0]undec-7-ene In toluene at 100℃; for 18h; Inert atmosphere; Sealed tube;96%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

4-chlorobenzophenone
134-85-0

4-chlorobenzophenone

(4-((2,2-difluoroethyl)amino)phenyl)(phenyl)methanone

(4-((2,2-difluoroethyl)amino)phenyl)(phenyl)methanone

Conditions
ConditionsYield
With C33H43ClNiO6P2; sodium triflate; 1,8-diazabicyclo[5.4.0]undec-7-ene In toluene at 100℃; for 18h; Inert atmosphere; Sealed tube;96%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2-Chloronitrobenzene
88-73-3

2-Chloronitrobenzene

N-(2,2-difluoroethyl)-2-nitroaniline
1186528-20-0

N-(2,2-difluoroethyl)-2-nitroaniline

Conditions
ConditionsYield
In acetonitrile for 24h; Reflux;95%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2,3-dichloro-7-methylpyrido[3,4-b]pyrazine

2,3-dichloro-7-methylpyrido[3,4-b]pyrazine

3-chloro-N-(2,2-difluoroethyl)-7-methylpyrido[3,4-b]pyrazin-2-amine

3-chloro-N-(2,2-difluoroethyl)-7-methylpyrido[3,4-b]pyrazin-2-amine

Conditions
ConditionsYield
With N-ethyl-N,N-diisopropylamine In dichloromethane at 20℃; for 48h;95%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2-methylphenyl bromide
95-46-5

2-methylphenyl bromide

N-(2,2-difluoro-ethyl)-o-toluidine
2366-95-2

N-(2,2-difluoro-ethyl)-o-toluidine

Conditions
ConditionsYield
With bis(η3-allyl-μ-chloropalladium(II)); 5-(di(adamantan-1-yl)phosphino)-1′,3′,5′-triphenyl-1′H-1,4′-bipyrazole; potassium phenolate In 1,4-dioxane at 100℃; for 6h; Sealed tube; Inert atmosphere;95%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

tolyl vinyl sulfone
5535-52-4

tolyl vinyl sulfone

3-((4-methylphenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

3-((4-methylphenyl)sulfonyl)-5-(difluoromethyl)-4,5-dihydro-1H-pyrazole

Conditions
ConditionsYield
Stage #1: 2,2-difluorethylamine; tolyl vinyl sulfone With tert.-butylnitrite; acetic acid In chloroform at 55℃; under 1034.32 Torr; for 0.166667h; Flow reactor;
Stage #2: In chloroform at 20℃;
Stage #3: With silica gel In hexane; ethyl acetate
95%
4-n-chlorophenylacetylene
873-73-4

4-n-chlorophenylacetylene

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

5-(4-chlorophenyl)-3-(difluoromethyl)isoxazole

5-(4-chlorophenyl)-3-(difluoromethyl)isoxazole

Conditions
ConditionsYield
With copper(l) iodide; tert.-butylnitrite; acetic acid; zinc dibromide In chloroform at 20℃; for 24h; Schlenk technique; Inert atmosphere;95%
tert.-butylnitrite
540-80-7

tert.-butylnitrite

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

(2-nitroethenyl)benzene
102-96-5

(2-nitroethenyl)benzene

N-(2,2-difluoroethyl)-N-(2-nitro-1-phenylethyl)nitrous amide

N-(2,2-difluoroethyl)-N-(2-nitro-1-phenylethyl)nitrous amide

Conditions
ConditionsYield
With acetic acid at 20℃; for 6h;95%
nitrostyrene
5153-67-3

nitrostyrene

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

N-(2,2-difluoroethyl)-N-(2-nitro-1-phenylethyl)nitrous amide

N-(2,2-difluoroethyl)-N-(2-nitro-1-phenylethyl)nitrous amide

Conditions
ConditionsYield
With tert.-butylnitrite; acetic acid at 20℃; for 3h; Reagent/catalyst; Temperature; Michael Addition;95%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

2-bromonaphthalene
580-13-2

2-bromonaphthalene

N-(2,2-difluoroethyl)naphthalen-2-amine

N-(2,2-difluoroethyl)naphthalen-2-amine

Conditions
ConditionsYield
With copper(I) oxide; C19H24N2O7; potassium carbonate In methanol at 100℃; for 24h; Ullmann Condensation;95%
6-chloronicotinylaldehyde
23100-12-1

6-chloronicotinylaldehyde

2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

N-[(6-chloropyridin-3-yl)methylidene]-2,2-difluoroethylamine
1135038-51-5

N-[(6-chloropyridin-3-yl)methylidene]-2,2-difluoroethylamine

Conditions
ConditionsYield
Stage #1: 6-chloronicotinylaldehyde; 2,2-difluorethylamine In toluene at 20℃; for 2h;
Stage #2: With magnesium sulfate In toluene at 50℃; for 5h;
94%
2,2-difluorethylamine
430-67-1

2,2-difluorethylamine

di-tert-butyl dicarbonate
24424-99-5

di-tert-butyl dicarbonate

tert-butyl N-(2,2-difluoroethyl)carbamate

tert-butyl N-(2,2-difluoroethyl)carbamate

Conditions
ConditionsYield
With 4-methyl-morpholine In tetrahydrofuran at 20℃; for 1.5h;94%
With triethylamine In dichloromethane at 25℃; for 16h;80.08%
With triethylamine In dichloromethane at 20℃;

430-67-1Relevant articles and documents

Carboxylic Acid Participation in Amide Hydrolysis. Evidence That Separation of a Nonbonded Complex Can Be Rate Determining

Kluger, Ronald,Chin, Jik

, p. 2891 - 2897 (1982)

Maleamic acids derived from aliphatic amines of a wide range of basicity (compounds 1-8) undergo hydrolysis in solutions of acidity between 1E-4 M and 1 M hydrogen ion concentration by a mechanism involving participation of the carboxyl group at the adjacent amide.Kinetic analysis of the reaction (50 deg C) reveals that the identity of the rate-determining step (or steps) is a function of both the basicity of the leaving group and the acidity of the solution.At pH 4, the rate-determining step is O to N proton transfer to form a zwitterionic intermediate for compounds with weakly basic leaving groups.For compounds with more basic leaving groups, conversion of the zwitterionic intermediate to products is rate determining.In more acidic solutions, where proton transfer is facilitated, diffusion apart from the complex formed from C-N bond breakage of the zwitterionic intermediate is rate determining for compounds with the most basic leaving groups.C-N bond breakage is rate determining for compounds with the least basic leaving groups.This suggests that at pH 4 the breakdown of the zwitterion may also involve rate-determining diffusion.It is concluded that other facile elimination reactions may involve rate-determining diffusion and that changes in the rate-determining step can serve as an indicator of its occurrence and as a means of calibration of rate constants.It is also suggested that since pepsin may catalyze peptide hydrolysis by a carboxyl-participation mechanism, the occurrence of sequential covalent intermediates may exist to permit diffusion of the noncovalently held products.

Method for synthesizing 2, 2-difluoroethylamine by using high-boiling residue in R142b as raw material

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Paragraph 0025-0032, (2021/01/24)

The invention belongs to the technical field of fluorine chemical industry, and particularly relates to a method for synthesizing 2, 2-difluoroethylamine by using a high-boiling residue in R142b as araw material. The method is characterized in that under the catalytic action of a catalyst 1 and a catalyst 2, 2, 2-difluoro-1-chloroethane and an ammonia water solution react in a solvent to prepare2, 2-difluoroethylamine. According to the method, the use of expensive noble metal catalysts can be avoided, the adopted phase transfer catalyst can be dissolved in a water phase and an organic phaserespectively, and can be in full contact with reactants so that the reaction is relatively thorough, the reaction rate is increased, the reaction temperature, the reaction pressure and the reaction time are reduced, and the product yield is high; the method has the advantages of low reaction temperature, low reaction pressure, low equipment requirement strength and simple operation steps, and therectified solvent and ammonia water solution can be continuously recycled, thereby reducing the discharge of three wastes, lowering the environmental pollution, and lowering the production cost and post-treatment cost.

PROCESS FOR THE PREPARATION OF 2,2-DIFLUOROETHYLAMINE STARTING FROM PROP-2-EN-1-AMINE

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Page/Page column 6, (2012/06/16)

A process for the preparation of 2,2-difluoroethylamine of the formula (I) [in-line-formulae]CHF2CH2NH2??(I)[/in-line-formulae] comprising the stages (i) and (ii): stage (i): reaction of 2,2-difluoro-1-haloethane of the formula (II) [in-line-formulae]CHF2—CH2Hal??(II)[/in-line-formulae] in which Hal is chlorine, bromine or iodine, with prop-2-en-1-amine of the formula (III) to give N-(2,2-difluoroethyl)prop-2-en-1-amine of the formula (IV) preferably in the presence of an acid scavenger, and stage (ii): removal of the allyl group from the N-(2,2-difluoroethyl)prop-2-en-1-amine of the formula (IV) obtained in stage (i) to give 2,2-difluoroethylamine of the formula (I) or a salt thereof.

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