Diphenylphosphinic chloride → methyl 3-(4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)phenyl)propanoate

HRID 1807281Notes

Reaction equation

HRID 1807281 reaction equation
[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]([CH3:27])([CH3:26])[CH3:25])[NH:10][C@H:9]2[C:28](O)=[O:29])[CH:5]=[CH:6][CH:7]=1.CCN(C(C)C)C(C)C.C1(P(Cl)(C2C=CC=CC=2)=O)C=CC=CC=1.[NH2:56][C:57]1[CH:62]=[CH:61][C:60]([CH2:63][CH2:64][C:65]([O:67][CH3:68])=[O:66])=[CH:59][CH:58]=1>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]([CH3:26])([CH3:27])[CH3:25])[NH:10][C@H:9]2[C:28]([NH:56][C:57]2[CH:58]=[CH:59][C:60]([CH2:63][CH2:64][C:65]([O:67][CH3:68])=[O:66])=[CH:61][CH:62]=2)=[O:29])[CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 73910Diphenylphosphinic chlorideHCID 81531DiisopropylethylamineHCID 417374Methyl 3-(4-aminophenyl)propanoateHCID 59249226(2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxylic acid

Product 1

HCID 53357489methyl 3-(4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)phenyl)propanoateYield 96.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of chiral (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 (80.6 mg, 0.172 mmol) in dichloromethane (3 ml) were added DIPEA (89.0 mg, 0.685 mmol) and DIPHENYLPHOSPHINIC CHLORIDE (106 mg, 0.437 mmol). The mixture was stirred for 20 mins under argon before methyl 3-(4-aminophenyl)propanoate (33.4 mg, 0.186 mmol) was added. After 2 hrs, the reaction mixture was diluted with dichloromethane, washed with sat. NaHCO3, water and brine. After drying over Na2SO4 the crude material was purified by silica gel chromatography with ethyl acetate and n-hexanes to give chiral methyl 3-(4-((2R,3S,4R,5S)-3-(3-chloro-2-fluorophenyl)-4-(4-chloro-2-fluorophenyl)-4-cyano-5-neopentylpyrrolidine-2-carboxamido)phenyl)propanoate (104.2 mg, 96%) as a white solid. MS (ES+) m/z Calcd: [(M+H)+]: 628.19. found: 628.1.

Workup

  1. additionwas added
  2. washwashed with sat. NaHCO3, water and brine
  3. dry with materialAfter drying over Na2SO4 the crude material
  4. customwas purified by silica gel chromatography with ethyl acetate and n-hexanes

Sources & evidence

ORD record
ord-7302fdc19706436aa28bd685ee8dc3fa
Source dataset
uspto-grants-2013_01
Patent number
US08354444B2

Reaction notes

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