Thermal rearrangement of 1,1,2,2-tetraphenylcyclopropane
Abstract
The thermal rearrangement of 1,1,2,2-tetraphenylcyclopropane (1) to 1,1,3-triphenylindan (2) involves formation of an intermediate triene (3) which has been detected by u.v. spectroscopy and trapped by reaction with enophiles.