Reactions of carbenes with bicyclobutanes and quadricyclane
作者:James E. Jackson、George B. Mock、Merry L. Tetef、Guo-xiu Zheng、Maitland Jones
DOI:10.1016/s0040-4020(01)96386-0
日期:1985.1
concerted addition in which the central and side bonds are cleaved simultaneously. MNDO calculations support such a pathway and suggest that endo attack on the bicyclobutane is preferred to exo. Reaction of the same two carbenes with quadricyclane gives substituted derivatives of the exo-tricyclo[3.2.1.02,4]oct-6-ene system. Although these products rearrange further under the conditions of reaction and/or
Reaction of dicarbomethoxycarbene with quadricyclane
作者:Merry L. Tetef、Maitland Jones
DOI:10.1016/s0040-4039(00)99829-0
日期:1984.1
Dicarbomethoxycarbene reacts with quadricyclane to give mainly 3,3-dicarbomethoxy--tricyclo[3.2.1.02,4]oct-6-ene. Although this is the same major product as formed by reaction of the carbene with norbornadiene, it is shown that reaction with quadricyclane is direct and does not involve prior isomerization to the diene.