Preparation of 2-Alkenylsilanes and 2-Alkenylstannanes by the Reaction of 2-Alkenyl-1,1-cyclopropanedicarboxylate Esters with PhMe<sub>2</sub>SiAlEt<sub>2</sub>and (Ph<sub>3</sub>Sn)<sub>2</sub>Zn. Generation of 2-Alkenyl-3-cyclopentene-1,1-dicarboxylates via Alkenyl Substituted π-Allylpalladium Complexes Derived from Dienylsilanes and [PdCl<sub>2</sub>(CH<sub>3</sub>CN)<sub>2</sub>]
作者:Keigo Fugami、Koichiro Oshima、Kiitiro Utimoto、Hitosi Nozaki
DOI:10.1246/bcsj.60.2509
日期:1987.7
π-allylpalladium complexes by means of [PdCl2(CH3CN)2]. Treatment of the alkenyl-substituted π-allylpalladium complexes derived from dienylsilanes and [PdCl2(CH3CN)2] with bases such as PPh3 or Na2CO3 gave 2-alkenyl-3-cyclopentene-1,1-dicarboxylates. In contrast, the reaction of the π-allylpalladiums generated from 2-alkenylsilanes and [PdCl2(CH3CN)2] with the bases resulted in the formation of original
2-乙烯基-1,1-环丙烷二羧酸酯与 PhMe2SiAlEt2、PhMe2SiZnEt2Li 或 (Ph3Sn)2Zn 的反应得到 1,7-均共轭加成产物、2-烯基硅烷或 2-烯基锡烷。以类似的方式,2-(1,3-丁二烯基)-1,1-环丙烷二羧酸酯提供了相应的 1,9-同共轭加合物、二烯基硅烷或二烯基锡烷。通过[PdCl2(CH3CN)2]将加合物转化为π-烯丙基钯配合物。用碱如 PPh3 或 Na2CO3 处理衍生自二烯基硅烷和 [PdCl2(CH3CN)2] 的烯基取代的 π-烯丙基钯配合物,得到 2-烯基-3-环戊烯-1,1-二羧酸盐。相比之下,由 2-烯基硅烷和 [PdCl2(CH3CN)2] 生成的 π-烯丙基钯与碱的反应导致原始乙烯基环丙烷衍生物的形成。