Conjugate addition of vinylic organocuprates generated via transmetalation of phenylseleno-substituted vinylzirconates: Functionalization at the 4-position of enones
作者:Masahito Segi、Masahiro Suzuki、Kazuki Shintaku、Hajime Maeda
DOI:10.1002/hc.20720
日期:——
propargylic selenides (1) or 4-phenylseleno-1-butyne (2) with Cp2ZrHCl, followed by in situ transmetalation to cuprate (Me2Cu(CN)Li2) and addition of enones, led to the formation of 1,4-adducts in good yields. The adducts derived from 1 were subjected to oxidation with H2O2 to afford allylic alcohol derivatives via [2,3] sigmatropic rearrangement of allylic selenides. On the other hand, the oxidation
炔丙基硒化物 (1) 或 4-苯基硒基-1-丁炔 (2) 与 Cp2ZrHCl 的氢化锆化,然后原位金属转移为铜酸盐 (Me2Cu(CN)Li2) 并添加烯酮,导致形成 1,4-加合物收益良好。衍生自 1 的加合物用 H2O2 进行氧化,通过烯丙基硒化物的 [2,3] σ 重排得到烯丙醇衍生物。另一方面,源自 2 的产物的氧化通过氧化硒消除产生在 β 位具有共轭二烯部分的相应酮。© 2011 Wiley Periodicals, Inc. 杂原子化学 22:545–552, 2011; 在 wileyonlinelibrary.com 上在线查看这篇文章。DOI 10.1002/hc.20720