Competing cheletropic reactions of difluorocarbene with various 2-substituted norbornadienes
作者:Charles W. Jefford、Phan Thanh Huy
DOI:10.1016/s0040-4039(00)71464-x
日期:1980.1
Norbornadienes substituted at C2 with electron donating, conjugating, and withdrawing groups react with difluorocarbene to give a ratio of 1,2 to homo-1,4 adducts, which reflects a diminishing response of electrophilic character in the carbene.
Regiochemical control in the homo-Diels-Alder reaction: substituent effects
作者:Mark Lautens、Louise G. Edwards
DOI:10.1021/jo00012a003
日期:1991.6
The regio- and stereoselectivity of the cyclo-addition between substituted norbornadienes and electron-deficient olefins catalyzed by nickel complexes has been studied. The diene and dienophile substituents as well as the ligand were found to exert a dramatic effect on the selectivity.
LAUTENS, MARK;EDWARDS, LOUISE G., J. ORG. CHEM., 56,(1991) N2, C. 3761-3763