4-Chloro-3-methyl-1,2-oxazol-5-amine → HCID 23445514, compound

Participants

Reaction Steps

N-(4-chloro-3-methyl-5-isoxazolyl)-5-(5-ethyl- 2-thienyl)thiophene-2-sulfonamide was prepared in the same manner as in Example 2. Reaction of 2-chlorosulfonyl-5-(5-ethyl-2-thienyl)thiophene (Example 141C, 200 mg, 0.68 mmol) with 5-amino-4-chloro-3-methylisoxazole (91 mg, 0.68 mmol) yielded 188 mg of the final product (71% yield). A small portion of the product was further purified by preparative HPLC to give the pure sulfonamide as a tan colored solid.

Provenance & Evidence