反应详情

1-Cyclopentylisoquinoline (obtained from 1-cyano-2-benzoyl-1,2-dihydroisoquinoline and cyclopentyl bromide) and N-hydroxymethyl dichloroacetamide were reacted in the same way as in step (b) of Example 18 to obtain 1-cyclopentyl-5-dichloroacetylaminomethylisoquinoline having a melting point of 151.0° to 152.3° C. The product was successively reacted in the same way as in steps (c), (d), (e), and (f) of Example 18 to afford 1-cyclopentylisoquinoline-5-acetonitrile having a melting point of 99.4° to 100.0° C.