Asymmetric induction in [1+4] cycloadditions of vinyl isocyanates with chiral nucleophilic carbenes
作者:James H. Rigby、Alexandre Cavezza、Mary Jane Heeg
DOI:10.1016/s0040-4039(99)00280-4
日期:1999.3
Several chirally-modified nucleophilic carbenes afford useful levels of asymmetric induction during [1+4] cycloaddition with vinyl isocyanate reaction partners. Carbenes derived from the 1,2-aminoalcohols (1R,2S)-ephedrine and (1R,2S)-methylaminoindanol proved to be the most effective for delivering high levels of asymmetric induction.
几种手性修饰的亲核碳烯在异氰酸乙烯基酯反应伙伴的[1 + 4]环加成反应中提供了有用的不对称诱导水平。事实证明,衍生自1,2-氨基醇(1R,2S)-麻黄碱和(1R,2S)-甲基氨基茚满醇的卡宾对提供高水平的不对称诱导作用最为有效。