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
使用后者的几种衍
生物测试了[2.2]metacyclophane的
碘诱导的环异构化反应中的取代基效应和定向选择性。发现该反应具有高度选择性,并且给电子基团产生了保留取代芳环的六氢
芘。另一方面,桥邻位的烷基得到带有氢化取代环的六氢
芘。