Water → methyl 6-bromo-1-tosyl-1H-indazole-4-carboxylate

HRID 38852Notes

Reaction equation

[H-].[Na+].[Br:3][C:4]1[CH:5]=[C:6]([C:13]([O:15][CH3:16])=[O:14])[C:7]2[CH:8]=[N:9][NH:10][C:11]=2[CH:12]=1.[CH3:17][C:18]1[CH:23]=[CH:22][C:21]([S:24](Cl)(=[O:26])=[O:25])=[CH:20][CH:19]=1.O>CN(C)C=O>[Br:3][C:4]1[CH:5]=[C:6]([C:13]([O:15][CH3:16])=[O:14])[C:7]2[CH:8]=[N:9][N:10]([S:24]([C:21]3[CH:22]=[CH:23][C:18]([CH3:17])=[CH:19][CH:20]=3)(=[O:26])=[O:25])[C:11]=2[CH:12]=1

Participants

Conditions

Temperature: 0 °C

Procedure

Sodium hydride (1.289 g, 32.2 mmol) was added portion wise to a solution of methyl 6-bromo-1H-indazole-4-carboxylate (4.11 g, 16.11 mmol) in N,N-dimethylformamide (50 ml) at 0° C. The dark orange mixture was stirred at 0° C. for 10 mins, then treated with 4-methylbenzenesulfonyl chloride (3.38 g, 17.72 mmol). The resultant pale cream mixture was stirred for 30 mins at 0° C. then poured into water (1000 ml). The cream precipitate was filtered off under vacuum and dried in the vacuum oven at 50° C. for 18 h to give the title compound as a yellow solid (5.51 g).

Workup

stirringThe resultant pale cream mixture was stirred for 30 mins at 0° C.
filtrationThe cream precipitate was filtered off under vacuum
customdried in the vacuum oven at 50° C. for 18 h

Sources & evidence

ORD record: ord-c7c2f7b17609413b8ddc990e20123999
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08524751B2

Reaction notes

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