Hydrochloric Acid → 5-(4-Hydroxy-phenylsulfanyl)-4-nitro-thiophene-2-carboxylic acid

Participants

Reaction Steps

The product from Example 351B (1 equiv) was dissolved in a methanol/water 3/1 mixture followed by the addition of lithium hydroxide (5 equiv). The resultant solution was stirred at room temperature for 24 hours followed by the addition of 1N aqueous hydrochloric acid until the solution was a pH of 2. The mixture was then extracted with ethyl acetate, the organic extracts dried and concentrated under vacuum to provide the title product.

Provenance & Evidence