Abstract: Oligomerization of 1-cyclopropyl-1,3-butadiene (1) was accomplished by the catalytic action of nickel(0)-triphenylphosphine. The incorporation of the cyclopropane ring was evident since the dimer 2 isolated in ca. 50% was 4-cyclopropyl-1,5,7,9-undecatetraene. The head-to-head type structure of 2 was proved by the use of 1-cyclopropyl-4,4-dideuterio-1,3-butadiene (1d).
摘要:1-环丙基-
1,3-丁二烯(1)的低聚反应是在
镍(0)-
三苯基膦的催化作用下完成的。
环丙烷环的掺入是明显的,因为二聚体 2 在大约 2 中分离。50%是4-环丙基-1,5,7,9-十一碳四烯。通过使用 1-环丙基-4,4-双
氘代-
1,3-丁二烯 (1d) 证明了 2 的头对头型结构。