1-Phenyl-5-chloroisoquinoline → 1-Phenyl-5-cyanoisoquinoline

Participants

Reaction Steps

1-Amino-2-(2-chlorophenyl)ethane and benzoyl chloride were reacted in the same way as in step (a) of Example 13 to afford 1-benzoylamino-2-(2-chlorophenyl)-ethane having a melting point of 70.1° to 71.0° C. (b) 1-Benzoylamino-2-(2-chlorophenyl)ethane, phosphorus oxychloride and phosphorus pentoxide were reacted in the same way as in step (b) of Example 13 to afford 1-phenyl-5-chloro-3,4-dihydroquinoline as an oil. (c) 1-Phenyl-5-chloro-3,4-dihydroisoquinoline and diphenyl disulfide were reacted in the same way as in step (c) of Example 13 to afford 1-phenyl-5-chloroisoquinoline as colorless needles having a melting point of 66.0° to 66.6° C. (d) 1-Phenyl-5-chloroisoquinoline, copper cyanide and hexamethylphosphotriamide were reacted in the same way as in step (d) of Example 13 to afford 1-phenyl-5-cyanoisoquinoline as an oil. (e) 1-Phenyl-5-cyanoisoquinoline was treated in the same way as in step (e) of Example 13 to afford 1-phenyl-5-methoxycarbonylisoquinoline as colorless needles having a melting point of 102.2° to 103.1° C. (f) 1-Phenyl-5-methoxycarbonylisoquinoline and dihydrobis(2-methoxyethoxy)aluminum sodium (in 70% benzene) were reacted in the same way as in step (f) of Example 13 to afford 1-phenyl-5-hydroxymethylisoquinoline as colorless plates having a melting point of 97.3° to 97.9° C. (g) 1-Phenyl-5-hydroxymethylisoquinoline was treated in the same way as in step (g) of Example 13 to afford 1-phenyl-5-chloromethylisoquinoline having a melting point of 104.0° to 104.2° C. (h) 1-Phenyl-5-chloromethylisoquinoline was treated by the same way as in step (h) of Example 13 to afford 1-phenylisoquinoline-5-acetonitrile as an oil.

Provenance & Evidence