Potassium Carbonate → N-(Diphenylmethylene) (3,4,5-trifluoro)-D,L-Phenylalanine ethyl ester

HRID 1365892Notes

Reaction equation

[CH2:1]([O:3][C:4](=[O:20])[CH2:5][N:6]=[C:7]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[CH3:2].[F:21][C:22]1[CH:23]=[C:24]([CH:27]=[C:28]([F:31])[C:29]=1[F:30])[CH2:25]Br.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O>[CH2:1]([O:3][C:4](=[O:20])[CH:5]([CH2:25][C:24]1[CH:23]=[C:22]([F:21])[C:29]([F:30])=[C:28]([F:31])[CH:27]=1)[N:6]=[C:7]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1)[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1)[CH3:2]

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of N-(Diphenylmethylene)glycine ethyl ester (1.10 g, 4.1 mmol) and 3,4,5-trifluorobenzylbromide (0.91 g, 4.0 mmol) in dimethylformamide (10 mL) was treated with anhydrous potassium carbonate (2.83 g, 20.5 mmol) and stirred for 18 hrs at 25° C. The mixture was filtered and the filtrate was evaporated to dryness to give crude product. It was purified by column chromatography on silica gel (hexane:ethyl acetate=4:1) to give title compound (1.2 g).

Workup

filtrationThe mixture was filtered
customthe filtrate was evaporated to dryness
customto give crude product
customIt was purified by column chromatography on silica gel (hexane:ethyl acetate=4:1)

Sources & evidence

ORD record: ord-05b40dc57839432c85bea424e6b6107b
Source dataset: uspto-grants-2011_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07893020B2

Reaction notes

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