Rhodium-Catalyzed Asymmetric One-Pot Transesterification and [2 + 2 + 2] Cycloaddition Leading to Enantioenriched 3,3-Disubstituted Phthalides
作者:Ken Tanaka、Takuya Osaka、Keiichi Noguchi、Masao Hirano
DOI:10.1021/ol070179j
日期:2007.3.1
a cationic rhodium(I)/Solphos complex-catalyzed asymmetric one-pot transesterification and [2 + 2 + 2] cycloaddition of 1,6-diyne esters with tertiary propargylic alcohols leading to enantioenriched tricyclic 3,3-disubstituted phthalides. The present method represents a versatile new route to the synthesis of enantioenriched tricyclic 3,3-disubstituted phthalides in view of the easy access to both coupling
[结构:见文字]。我们已经开发出阳离子铑(I)/ Solphos络合物催化的不对称单锅酯交换反应,以及1,2-二炔酯与叔炔丙醇的[2 + 2 + 2]环加成反应,从而生成对映体富集的三环3,3-二取代的邻苯二甲酸酯。鉴于容易获得两个偶联配偶体,本方法代表了合成对映体富集的三环3,3-二取代邻苯二甲酸酯的通用新途径。