Conformational control of stereochemistry in the non-concerted, degenerate rearrangement of a vinylcyclopropane
作者:W. von E. Doering、E.K.G. Schmidt
DOI:10.1016/s0040-4020(01)91600-x
日期:1971.1
The stereochemistry of the degenerate, thermal vinylcyclopropane rearrangement of (−)-2,2,3-trideuterio-Δ3-thujene has been elucidated. Determination of partitioning among the three products of enantiomerization and rearrangement to (+) and (−) 5,5,6-trideuterio-Δ3-thujene reveals that the major path is forbidden by orbital symmetry and is therefore non-concerted, while the minor paths are equally
简并的立体化学,热重排乙烯基环丙烷( - ) - 2,2,3- trideuterio-Δ 3 -thujene已经阐明。( - )的三种产品enantiomerization和重排的间划分到(+)和测定5,5,6-trideuterio-Δ 3 -thujene表明,主要路径由轨道对称性禁止,因此非一致的,而次要路径在禁止路径和允许路径之间平均分配。这种无构想的重排的高度立体选择性是由构象平衡的小障碍解释的。外消旋化的速率由表达式log k(sec -1)= 14·33-43·4/2·303 RT给出。