Water → 6-chloro-4'-[5-chloro-2-(1-hydroxycarbonyl-1-methyl-ethoxy)-phenyl]-2'-(5-fluoro-2-methyl-phenyl) spiro[3H-indole-3,3'-piperidine]-2,6'(1H)-dione

HRID 658905Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[C:6]2[NH:8][C:9](=[O:41])[C:10]3([CH:15]([C:16]4[CH:21]=[C:20]([Cl:22])[CH:19]=[CH:18][C:17]=4[O:23][C:24]([C:27]([O:29]CC)=[O:28])([CH3:26])[CH3:25])[CH2:14][C:13](=[O:32])[NH:12][CH:11]3[C:33]3[CH:38]=[C:37]([F:39])[CH:36]=[CH:35][C:34]=3[CH3:40])[C:5]2=[CH:4][CH:3]=1.[OH-].[Na+].O>CO>[Cl:1][C:2]1[CH:7]=[C:6]2[NH:8][C:9](=[O:41])[C:10]3([CH:15]([C:16]4[CH:21]=[C:20]([Cl:22])[CH:19]=[CH:18][C:17]=4[O:23][C:24]([C:27]([OH:29])=[O:28])([CH3:25])[CH3:26])[CH2:14][C:13](=[O:32])[NH:12][CH:11]3[C:33]3[CH:38]=[C:37]([F:39])[CH:36]=[CH:35][C:34]=3[CH3:40])[C:5]2=[CH:4][CH:3]=1

Participants

Conditions

Temperature: 80 °C

Procedure

A mixture of chiral (2′S, 3S, 4′R)-6-chloro-4′-[5-chloro-2-(1-ethoxycarbonyl-1-methyl-ethoxy)-phenyl]-2′-(5-fluoro-2-methyl-phenyl) spiro[3H-indole-3,3′-piperidine]-2,6′(1H)-dione (4.8 g, 8.03 mmol), NaOH (1.6 g, 40 mmol), H2O (30 mL) and methanol (50 mL) was heated at 80° C. for 1 h. Then methanol was removed under reduced pressure and the aqueous solution was acidified by concentrated hydrochloride to “pH” 1-2. The white precipitate was collected by filtration and dried to give the title compound as a white solid (4 g).

Workup

customThen methanol was removed under reduced pressure
filtrationThe white precipitate was collected by filtration
customdried

Sources & evidence

ORD record: ord-4313d1ae9e944df0822238711470c440
Source dataset: uspto-grants-2011_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08076482B2

Reaction notes

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