Methyl bromoacetate → 6-Chloro-4'-(3-chlorophenyl)-2,3-dihydro-1'-[(methoxycarbonyl)-methyl]-2'-(2-methylphenyl)-2,6'-dioxo spiro[indole-3,3'-piperidine]-1-carboxylic acid tert-butyl ester
Reaction equation
[C:1]([O:5][C:6]([N:8]1[C:36]2[C:31](=[CH:32][CH:33]=[C:34]([Cl:37])[CH:35]=2)[C:10]2([CH:15]([C:16]3[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=3)[CH2:14][C:13](=[O:23])[NH:12][CH:11]2[C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=2[CH3:30])[C:9]1=[O:38])=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Li+].Br[CH2:42][C:43]([O:45][CH3:46])=[O:44]>>[C:1]([O:5][C:6]([N:8]1[C:36]2[C:31](=[CH:32][CH:33]=[C:34]([Cl:37])[CH:35]=2)[C:10]2([CH:15]([C:16]3[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=3)[CH2:14][C:13](=[O:23])[N:12]([CH2:42][C:43]([O:45][CH3:46])=[O:44])[CH:11]2[C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][C:25]=2[CH3:30])[C:9]1=[O:38])=[O:7])([CH3:4])([CH3:2])[CH3:3]Participants
4
Reactant 3
Product 1
Procedure
In a manner similar to the method described in example 24c, racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2,3-dihydro-2′-(2-methylphenyl)-2,6′-dioxospiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester (1.02 g, 1.86 mmol) prepared in example 24b was reacted with LiH (86 mg, 10.9 mmol) (Aldrich) and methyl bromoacetate (0.57 g, 3.72 mmol) (Aldrich) to give racemic 2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2,3-dihydro-1′-[(methoxycarbonyl)-methyl]-2′-(2-methylphenyl)-2,6′-dioxospiro[indole-3,3′-piperidine]-1-carboxylic acid tert-butyl ester as a white solid (Yield: 0.37 g, 32%).
Sources & evidence
- ORD record
- ord-c85a10605b61426393e3fd860a5e3349
- Source dataset
- uspto-grants-2009_02
- Patent number
- US07495007B2
Reaction notes
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