Hydrochloric Acid → 5-(3,3-dimethyl-but-1-ynyl)-3-[N-(4-methyl-cyclohexanecarbonyl)-hydrazino]-thiophene-2-carboxylic acid

Participants

Reaction Steps

To a solution of 5-(3,3-dimethyl-but-1-ynyl)-3-[N-(4-methyl-cyclohexanecarbonyl)-N′-(2,2,2-trifluoro-acetyl)-hydrazino]-thiophene-2-carboxylic acid methyl ester (1.6 g, 3.4 mmol) in EtOAc (20 mL) was added NaOH (6.8 mL of 2M aq solution). After 2 h stirring at rt, the reaction was neutralized with 1M HCl aq, extracted with EtOAc, dried over Na2SO4, and concentrated to give 5-(3,3-dimethyl-but-1-ynyl)-3-[N-(4-methyl-cyclohexanecarbonyl)-hydrazino]-thiophene-2-carboxylic acid (1.1 g, 3 mmol) as an off white solid.

Provenance & Evidence