Dibenzo[a.d]cycloheptenylidene and tribenzo[a,c,e]cycloheptenylidene
作者:S.-I. Murahashi、I. Moritani、M. Nishino
DOI:10.1016/s0040-4020(01)90767-7
日期:1971.1
Photolysis of 5-diazo[a,d]cycloheptene (10) and 9-diazotribenzo[a,c,e]cycloheptene (23) in cis and trans-2-butene led stereospecifically to the formation of cyclopropane derivatives. Nonstereospecific addition of dibenzo[a,d]cycloheptenylidene could not be detected by carrying out the photolysis in a large excess of cyclohexane, or by photosensitized decomposition of 10. It is concluded that photolysis