作者:Olga A. Ivanova、Alexey O. Chagarovskiy、Alexey N. Shumsky、Vasiliy D. Krasnobrov、Irina I. Levina、Igor V. Trushkov
DOI:10.1021/acs.joc.7b02351
日期:2018.1.19
donor–acceptor cyclopropanes, containing an alkenyl moiety and diverse electron-withdrawing group(s) at the adjacent positions, into substituted cyclopentenes. We have found that 1,1,2-trisubstituted cyclopent-3-enes were exclusively obtained in yield of 51–99% when cyclopropanes with a 2-substituted alkenyl group as a donor underwent isomerization. For cyclopropanes bearing a trisubstituted alkenyl group either
我们报道了一种温和的路易斯酸诱导的供体-受体环丙烷异构化为取代的环戊烯,该环含一个烯基部分和在相邻位置的多个吸电子基团。我们发现,当带有2-取代烯基作为供体的环丙烷进行异构化反应时,仅获得1,1,2-三取代的环戊-3-烯,收率为51-99%。对于带有三取代烯基的环丙烷,形成了相应的环戊-3-烯或在C(1)原子上具有两个受体基团的异构环戊-2-烯,反应选择性由所用的路易斯酸决定。我们已经表明,供体-受体环丙烷的反应性随与烯基部分连接的(杂)芳族基团的供电子特性的增加而增加。