The Cycloisomerization Reaction of [2.2]Metacyclophanes to 1,2,3,3a,4,5-Hexahydropyrenes. Substituent Effects and Directional Selectivity
作者:Takeshi Yamagishi、Koichi Torizuka、Takeo Sato
DOI:10.1246/bcsj.55.1140
日期:1982.4
Substituent effects and directional selectivity in iodine-induced cycloisomerization reaction of [2.2]metacyclophane were tested using several derivatives of the latter. The reaction was found to be highly selective, and electron-donating groups gave a hexahydropyrene preserving a substituted aryl ring. On the other hand, an alkyl group ortho to the bridge gave a hexahydropyrene with a hydrogenated