Controlling, Understanding, and Redirecting the Thermal Rearrangement of 3,3-Dicyano-1,5-enynes
作者:Sarah K. Scott、Jacob N. Sanders、Katherine E. White、Roland A. Yu、K. N. Houk、Alexander J. Grenning
DOI:10.1021/jacs.8b08553
日期:2018.11.28
The thermal [3,3] rearrangement of 3,3-dicyano-1,5-enynes to γ-allenyl alkylidenemalononitriles (the "enyne Cope rearrangement") has largely eluded synthetic value as the desired products, too, are thermally reactive and ultimately yield 6π electrocyclization products. Herein, we describe experimental and computational studies related to the thermal rearrangement of 1,5-enynes, structural features
3,3-二氰基-1,5-烯炔的热[3,3]重排生成γ-丙二烯基亚烷基丙二腈(“烯炔Cope重排”)在很大程度上回避了合成价值,因为所需的产物也具有热反应性并最终产生6π电环化产物。在此,我们描述了与 1,5-烯炔热重排相关的实验和计算研究、在丙二烯阶段停止热重排的结构特征以及用于制备双功能联烯基丙二腈的还原变体。我们还描述了操纵双功能构建块并将其转换为循环和非循环架构的各种方法。