Sodium hydride → (2S,3S,5R)-2-Benzyl-3-[(5-bromo-pyrimidin-2-yl)-(3-chloro-5-trifluoromethyl-benzyl)-amino]-5-ethyl-pyrrolidine-1-carboxylic acid isopropyl ester

HRID 409428Notes

Reaction equation

HRID 409428 reaction equation
[CH:1]([O:4][C:5]([N:7]1[C@H:11]([CH2:12][CH3:13])[CH2:10][C@H:9]([NH:14][C:15]2[N:20]=[CH:19][C:18]([Br:21])=[CH:17][N:16]=2)[C@@H:8]1[CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=[O:6])([CH3:3])[CH3:2].[H-].[Na+].[Cl:31][C:32]1[CH:33]=[C:34]([CH:37]=[C:38]([C:40]([F:43])([F:42])[F:41])[CH:39]=1)[CH2:35]Br>CN(C=O)C>[CH:1]([O:4][C:5]([N:7]1[C@H:11]([CH2:12][CH3:13])[CH2:10][C@H:9]([N:14]([C:15]2[N:20]=[CH:19][C:18]([Br:21])=[CH:17][N:16]=2)[CH2:35][C:34]2[CH:37]=[C:38]([C:40]([F:41])([F:42])[F:43])[CH:39]=[C:32]([Cl:31])[CH:33]=2)[C@@H:8]1[CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)=[O:6])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 24758Sodium hydride2×HCID 37146721-(Bromomethyl)-3-chloro-5-(trifluoromethyl)benzeneHCID 59614351(2S,3S,5R)-2-benzyl-3-(5-bromo-pyrimidin-2-ylamino)-5-ethyl-pyrrolidine-1-carboxylic acid isopropyl ester

Product 1

HCID 42633349(2S,3S,5R)-2-Benzyl-3-[(5-bromo-pyrimidin-2-yl)-(3-chloro-5-trifluoromethyl-benzyl)-amino]-5-ethyl-pyrrolidine-1-carboxylic acid isopropyl esterYield 73.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a suspension of (2S,3S,5R)-2-benzyl-3-(5-bromo-pyrimidin-2-ylamino)-5-ethyl-pyrrolidine-1-carboxylic acid isopropyl ester (0.064 mmol; 28.6 mg) and sodium hydride (60% dispersion in mineral oil, 0.19 mmol; 7.6 mg) in DMF (0.6 mL) is added 3-chloro-5-trifluoromethylbenzyl bromide (0.13 mmol; 35.6 mg) at room temperature under N2. After 3.5 hours, additional sodium hydride (60% dispersion in mineral oil, 0.19 mmol; 7.6 mg) is added to the suspension. The reaction mixture is stirred for 20 minutes, and quenched with water and saturated aqueous ammonium chloride solution. The product is extracted three times with EtOAc. The combined organic layer is washed with brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue is purified by column chromatography on silica gel (eluent: n-hexane/EtOAc) to give (2S,3S,5R)-2-Benzyl-3-[(5-bromo-pyrimidin-2-yl)-(3-chloro-5-trifluoromethyl-benzyl)-amino]-5-ethyl-pyrrolidine-1-carboxylic acid isopropyl ester (30.0 mg, 73%); ESI-MS m/z: 639 [M+1]+, Retention time 2.68 min (condition A).

Workup

  1. customquenched with water and saturated aqueous ammonium chloride solution
  2. extractionThe product is extracted three times with EtOAc
  3. washThe combined organic layer is washed with brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue is purified by column chromatography on silica gel (eluent: n-hexane/EtOAc)

Sources & evidence

ORD record
ord-7809089de0224b668716ca9d48bb6531
Source dataset
uspto-grants-2014_06
Patent number
US08759365B2

Reaction notes

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