Addition Chemistry of Rod-Shaped 1,6-Dicyanohexatriyne: Regioselectivity Control by the Remote Cyano Function
作者:Günther Schermann、Otto Vostrowsky、Andreas Hirsch
DOI:10.1002/(sici)1099-0690(199910)1999:10<2491::aid-ejoc2491>3.0.co;2-u
日期:1999.10
The addition of different alcohols, amines, thioalcohols, ethers, cycloalkanes, tin hydride, alkenes or alkadienes to 1,6-dicyano-1,3,5-hexatriyne (1) leads, with a pronounced regioselectivity, to a series of substituted 1-ene-3,5-diynes. The addition of alcohols, amines and thiols proceeds preferentially in a syn mode leading to diastereomers with an E configuration. The reaction with free radicals
将不同的醇、胺、硫醇、醚、环烷烃、氢化锡、烯烃或链二烯加成到 1,6-二氰基-1,3,5-己三炔 (1) 中,具有显着的区域选择性,产生一系列取代的 1 -ene-3,5-二炔。醇、胺和硫醇的加成优先以顺式模式进行,导致具有 E 构型的非对映异构体。另一方面,与自由基的反应以反加成模式进行。[4+2] 和 [2+2] 环加成分别与 1 产生不饱和六元和四元环加合物。[2+2] 环加成产生的环丁烯衍生物发生自发的电环开环反应,形成丁二烯衍生物。亲核加成形成 1 仅导致供体原子结合在 C-1 处的产物。