Diisopropylethylamine → racemic methyl 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-2-ethoxybenzoate

HRID 1807273Notes

Reaction equation

HRID 1807273 reaction equation
[Cl:1][C:2]1[C:3]([F:31])=[C:4]([CH:8]2[C:12]([C:15]3[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=3[F:22])([C:13]#[N:14])[CH:11]([CH2:23][C:24]([CH3:27])([CH3:26])[CH3:25])[NH:10][CH:9]2[C:28]([OH:30])=O)[CH:5]=[CH:6][CH:7]=1.CCN(C(C)C)C(C)C.[NH2:41][C:42]1[CH:51]=[CH:50][C:45]([C:46]([O:48][CH3:49])=[O:47])=[C:44]([O:52][CH2:53][CH3:54])[CH:43]=1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>ClCCl>[Cl:1][C:2]1[C:3]([F:31])=[C:4]([C@@H:8]2[C@:12]([C:15]3[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=3[F:22])([C:13]#[N:14])[C@H:11]([CH2:23][C:24]([CH3:25])([CH3:26])[CH3:27])[NH:10][C@H:9]2[C:28]([NH:41][C:42]2[CH:51]=[CH:50][C:45]([C:46]([O:48][CH3:49])=[O:47])=[C:44]([O:52][CH2:53][CH3:54])[CH:43]=2)=[O:30])[CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 81531Diisopropylethylamine2×HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)2×HCID 666882513-(3-Chloro-2-fluoro-phenyl)-4-(4-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acidHCID 67368855Methyl 4-amino-2-ethoxybenzoate

Product 1

HCID 67368577racemic methyl 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-2-ethoxybenzoateYield 107.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of rac-(2R,3S,4R,5S)-3-(3-chloro-2-fluoro-phenyl)-4-(4-chloro-2-fluoro-phenyl)-4-cyano-5-(2,2-dimethyl-propyl)-pyrrolidine-2-carboxylic acid (60.8 mg, 0.13 mmol) in dichloromethane (3 mL) were added DIPEA (89.0 mg, 0.69 mmol), methyl 4-amino-2-ethoxybenzoate (50.9 mg, 0.26 mmol) and HATU (90.8 mg, 0.24 mmol). (The acid, DIPEA, and HATU were added in thirds at 20 min intervals). After 90 min, the reaction was diluted with dichloromethane, washed with water and saturated sodium chloride and purified by silica gel chromatography with ethyl acetate and hexanes to give racemic methyl 4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)-2-ethoxybenzoate (90 mg, with minor impurity) as a light brown oil.

Workup

  1. washwashed with water and saturated sodium chloride
  2. custompurified by silica gel chromatography with ethyl acetate and hexanes

Sources & evidence

ORD record
ord-926152449de24952b65d4050e4a6ef0c
Source dataset
uspto-grants-2013_01
Patent number
US08354444B2

Reaction notes

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