反应详情

By substituting 4-ethoxy-L-proline tert-butyl ester [prepared from 4-ethoxy-L-proline by the procedure described in J.Am. Chem. Soc., 82, 3359 (1960) for L-proline] for the L-proline tert-butyl ester and acetylthioacetyl chloride for the 3-acetylthio-2-methylpropanoyl chloride in the procedure of Example 1, and then submitting the product to the procedure of Example 2, (±)-4,5-dihydro-4-ethoxy-(2-mercapto-1-oxopropyl)-1H-pyrrole-2-carboxylic acid is obtained.