Pyridine-3-sulfonyl chloride hydrochloride → Pyridine-3-sulfonyl chloride

Pyridine-3-sulfonyl chloride hydrochloride (20 mg, 0.093 mmol) was dissolved in a mixture of dichloromethane and aqueous saturated NaHCO3 and the organic layer was dried (MgSO4) and evaporated to give pyridine-3-sulfonyl chloride. tert-Butyl 10-chloro-1,3,4,8-tetrahydro-2H-[1,4]oxazepino[6,7-e]indole-2-carboxylate (Intermediate 20, 10 mg, 0.031 mmol) was dissolved in DMF (1 mL) and sodium hydride (60% in mineral oil, 2.5 mg, 0.062 mmol) was added. The mixture was stirred for 10 minutes before pyridine-3-sulfonyl chloride (0.093 mmol) in DMF (1 mL) was added. The reaction mixture was stirred at room temperature for 10 minutes before TFA (2 mL) was added and the mixture was heated at 50° C. overnight. The reaction mixture was evaporated and the crude material was purified by preparative HPLC (ACE C8, 0.1% TFA-CH3CN) to give the title compound as a white solid (2.6 mg) in the form of the trifluoroacetate salt. MS m/z 364 [M+H]+.

1. dry with materialthe organic layer was dried (MgSO4)
2. customevaporated

ORD record

ord-de4cc3329605471c8a17a4ea4022e18b

Source dataset

uspto-grants-2011_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07960374B2