Intramolecular [2+2] Photocycloaddition. 14. Cycloreversion of Cyclophanes Possessing a Cyclobutane Ring at Their Tether
作者:Jun Nishimura、Yasuhiro Wada、Yukari Sano
DOI:10.1246/bcsj.65.618
日期:1992.2
Thermal cycloreversion of ten cyclophanes possessing a cyclobutane ring at their tether was examined. The rates were affected not only by their strain but also by their structural characteristics, such as meta- or para-configuration. The relative rate difference covered a range of the order of 106.
Styrene derivatives ( and ) were treated in dry benzene at 50 °C with a catalytic amount of CF3SO3H to afford [3.n.3.n]paracyclophanederivatives ( and ) in 80 and 62% yields, respectively.
将苯乙烯衍生物(和)在无水苯中于50℃下用催化量的CF 3 SO 3 H处理,分别以80%和62%的收率得到[3.n.3.n]对环烷衍生物(和)。