Octadienyl carbonates 5 provide cyclic 1,4-dienes 6 when treated with Rh1 complexes (1–10 mol-%) at 80°. Similar cyclization of cyclohexenyl acetate 8 affords cis- fused hexahydroindene 9. Analogous ring closures of nonadienyl carbonate 10 yield preferably the cis-divinypyrrolidine 11 with Rh1 catalysis but the trans-isomer 12 when catalyzed by Pd0. Azaoctadienyl carbonate 5a undergoes elimination
当在80°下用Rh 1配合物(1-10 mol%)处理时,
碳酸辛二烯酯5可提供环状1,4-二烯6。
环己烯基
乙酸酯8的类似环化反应可得到顺式稠合六氢
茚9。
碳酸壬二烯基酯10的类似的闭环优选在Rh 1催化下产生顺式-二
乙烯基吡咯烷11,而在Pd 0催化下则形成反式异构体12。
碳酸氮杂二烯基酯5a被[RhH(PPh 3)4消除](5 mol%,80°)在MeCN中得到无环
三烯。7。