Z-6-chloro-3-(4-chloro-benzylidene)-2-oxo-2,3-dihydro-indole-1-carboxylic acid ethyl ester → racemic (2'S,3S,4'R)-6-chloro-2'-(3-chlorophenyl)-4'-(4-chlorophenyl)-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine]-1-carboxylic acid ethyl ester

HRID 1727968Notes

Reaction equation

HRID 1727968 reaction equation
[CH2:1]([O:3][C:4]([N:6]1[C:14]2[C:9](=[CH:10][CH:11]=[C:12]([Cl:15])[CH:13]=2)/[C:8](=[CH:16]/[C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)/[C:7]1=[O:24])=[O:5])[CH3:2].[Cl:25][C:26]1[CH:27]=[C:28]([CH:32]=[N:33][C:34]([O:36][Si](C)(C)C)=[CH2:35])[CH:29]=[CH:30][CH:31]=1>C1(C)C=CC=CC=1>[CH2:1]([O:3][C:4]([N:6]1[C:14]2[C:9](=[CH:10][CH:11]=[C:12]([Cl:15])[CH:13]=2)[C:8]2([CH:16]([C:17]3[CH:18]=[CH:19][C:20]([Cl:23])=[CH:21][CH:22]=3)[CH2:35][C:34](=[O:36])[NH:33][CH:32]2[C:28]2[CH:29]=[CH:30][CH:31]=[C:26]([Cl:25])[CH:27]=2)[C:7]1=[O:24])=[O:5])[CH3:2]

Participants

4

Reactant 2

HCID 66879338Z-6-chloro-3-(4-chloro-benzylidene)-2-oxo-2,3-dihydro-indole-1-carboxylic acid ethyl esterHCID 68961886HCID 68961886, compound

Product 1

HCID 76567914racemic (2'S,3S,4'R)-6-chloro-2'-(3-chlorophenyl)-4'-(4-chlorophenyl)-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine]-1-carboxylic acid ethyl esterYield 95%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

In a manner similar to the method described in example 4c, E/Z-6-chloro-3-(4-chloro-benzylidene)-2-oxo-2,3-dihydro-indole-1-carboxylic acid ethyl ester (0.35 g, 0.97 mmol) prepared in example 9b was reacted with 1-(3-chlorophenyl)-3-trimethylsilyoxy-2-aza-1,3-butadiene prepared in example 1b, in toluene to give racemic (2′S,3S,4′R)-6-chloro-2′-(3-chlorophenyl)-4′-(4-chlorophenyl)-2,3-dihydro-2,6′-dioxospiro[indole-3,3′-piperidine]-1-carboxylic acid ethyl ester as a yellow solid (Yield 0.5 g, 95%).

Sources & evidence

ORD record
ord-f798cb0be5074993864006d968acf11a
Source dataset
uspto-grants-2009_02
Patent number
US07495007B2

Reaction notes

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