Metacyclophanes and related compounds. 18. Preparation of anti-5,14-di-tert-butyl-8,17-dimethyl[2.3]metacyclophan-1-ene and anti-5,15-di-tert-butyl-8,18-dimethyl[2.4]metacyclophan-1-enes with dichlorocarbene
Metacyclophanes and related compounds. 18. Preparation of anti-5,14-di-tert-butyl-8,17-dimethyl[2.3]metacyclophan-1-ene and anti-5,15-di-tert-butyl-8,18-dimethyl[2.4]metacyclophan-1-enes with dichlorocarbene