Water → 4-[3-[(Benzhydrylidene-amino)-tert-butoxycarbonyl-methyl]-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-butyryl]-2-methyl-benzoic acid tert-butyl ester

HRID 589642

Reaction equation

HRID 589642 reaction equation
[C:1]([O:5][C:6](=[O:30])[C:7]1[CH:12]=[CH:11][C:10]([C:13](=[O:28])/[CH:14]=[C:15](\[C:20]2[CH:25]=[C:24]([Cl:26])[CH:23]=[C:22]([Cl:27])[CH:21]=2)/[C:16]([F:19])([F:18])[F:17])=[CH:9][C:8]=1[CH3:29])([CH3:4])([CH3:3])[CH3:2].[C:31]([O:35][C:36](=[O:52])[CH2:37][N:38]=[C:39]([C:46]1[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=1)[C:40]1[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=1)([CH3:34])([CH3:33])[CH3:32].[OH-].[K+].O>C(#N)C>[C:1]([O:5][C:6](=[O:30])[C:7]1[CH:12]=[CH:11][C:10]([C:13](=[O:28])[CH2:14][C:15]([CH:37]([N:38]=[C:39]([C:46]2[CH:47]=[CH:48][CH:49]=[CH:50][CH:51]=2)[C:40]2[CH:41]=[CH:42][CH:43]=[CH:44][CH:45]=2)[C:36]([O:35][C:31]([CH3:34])([CH3:33])[CH3:32])=[O:52])([C:20]2[CH:25]=[C:24]([Cl:26])[CH:23]=[C:22]([Cl:27])[CH:21]=2)[C:16]([F:17])([F:19])[F:18])=[CH:9][C:8]=1[CH3:29])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 14797Potassium HydroxideHCID 688171N-(Diphenylmethylene)glycine tert-butyl esterHCID 866959924-[(E)-3-(3,5-Dichloro-phenyl)-4,4,4-trifluoro-but-2-enoyl]-2-methyl-benzoic acid tert-butyl ester

Product 1

HCID 866960024-[3-[(Benzhydrylidene-amino)-tert-butoxycarbonyl-methyl]-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-butyryl]-2-methyl-benzoic acid tert-butyl esterYield 21.3%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

4-[(E)-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-but-2-enoyl]-2-methyl-benzoic acid tert-butyl ester (0.100 g, 0.218 mmol) and (benzhydrylidene-amino)-acetic acid tert-butyl ester (0.079 g, 0.261 mmol) were dissolved in acetonitrile (5.0 ml). Potassium hydroxide (0.013 g, 0.239 mmol) and antracen-9-yl-methyl quininium chloride (0.030 g, 0.054 mmol) were added and the resulting mixture was heated at 90 C for 6 days. At this time water was added and the reaction mixture was extracted with dichloromethane (3×). The crude product was purified by flash chromatography (0% to 15% ethyl acetate in cyclohexane) to afford 4-[3-[(Benzhydrylidene-amino)-tert-butoxycarbonyl-methyl]-3-(3,5-dichloro-phenyl)-4,4,4-trifluoro-butyryl]-2-methyl-benzoic acid tert-butyl ester (0.035 g, 21%) as a white solid. Chiral HPLC analysis (Chiralpack IA, heptanes:t-buthanol=98:2, 1 ml/min, retention time 8.50 minutes and 9.23 minutes (enantiomers of the minor diasteromer); 13.37 minutes and 14.81 (enantiomers of the major diastereomer) indicated that the reaction products were formed in diastereomeric ratio 2:1.

Workup

  1. temperaturethe resulting mixture was heated at 90 C for 6 days
  2. extractionthe reaction mixture was extracted with dichloromethane (3×)
  3. customThe crude product was purified by flash chromatography (0% to 15% ethyl acetate in cyclohexane)

Sources & evidence

ORD record
ord-03fa278e0b9f4d8c982834a3e91379e9
Source dataset
uspto-grants-2016_01
Patent number
US09233920B2

Linked notes

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