5-Chlorothiophene-2-sulfonyl chloride → HCID 68429355, compound

Participants

Reaction Conditions

Reaction Steps

The amino(4,4-difluorocyclohexyl)acetic acid (2.68 g, 10.973 mmol) was dissolved in 2N NaOH (20 mL). The solution was cooled to 0° C., 5-chlorothiophene-2-sulfonyl chloride (3.25 g, 12.42 mmol) was added (5 min) dropwise as a solution in THF (10 mL). The solution was allowed to warm up to 25° C. overnight. After 19 h, THF was removed in vacuo and the mixture was acidified to a pH of about 1 to about 2 with 2N HCl (20 mL). The aqueous layer washed with EtOAc (4×50 mL). The combined organic layers were dried over MgSO4, filtered, and concentrated to produce {[(5-chlorothien-2-yl)sulfonyl]amino}(4,4-difluorocyclohexyl)acetic acid as a crude oil (3.8 g, 98.2%). Mass Spectrum (−ESI): 372 (M−H)−.

Provenance & Evidence