C<sub>sp<sup>3</sup></sub>–C<sub>sp<sup>3</sup></sub> and C<sub>sp<sup>3</sup></sub>–H Bond Activation of 1,1-Disubstituted Cyclopentane
作者:Chisato Mukai、Yuu Ohta、Yuki Oura、Yasuaki Kawaguchi、Fuyuhiko Inagaki
DOI:10.1021/ja309830p
日期:2012.12.5
unprecedented C(sp(3))-C(sp(3)) bond cleavage of unactivated cyclopentane has been achieved. Rh(I)-catalyzed cycloaddition of allenylcyclopentane-alkynes produced in situ the 9-cyclopentyl-8-rhodabicyclo[4.3.0]nona-1,6-diene intermediates, which subsequently underwent [7+2] cycloaddition via β-C elimination, affording bicyclo[7.4.0]tridecatriene derivatives in good yields. Changing the Rh(I) catalyst
未活化环戊烷的前所未有的 C(sp(3))-C(sp(3)) 键断裂已经实现。Rh(I)-催化的丙二烯基环戊烷-炔烃的环加成反应,原位生成 9-环戊基-8-铑双环 [4.3.0]nona-1,6-二烯中间体,随后通过 β-C 消除进行 [7+2] 环加成反应,以良好的产率提供双环[7.4.0]十三碳三烯衍生物。改变 Rh(I) 催化剂会影响常见的 9-环戊基-8-铑双环 [4.3.0] 壬 -1,6-二烯中间体的 Cγ-H 键活化,从而在一个位点产生新型螺 [2.4] 庚烷骨架- 选择性方式。