Stereoselective Three-Carbon and Two-Carbon Elongation of the Carbon Chain in N-Boc-Protected α-Aminoacylsilanes: An Entry to Functionalized β-Amino Alcohols and to Statine Analogues
Facile synthesis of versatile functionalized amino caprolactams using RCM reactions of α-amino acrylamide
作者:Gang Liu、Wan-Yi Tai、Yu-Lin Li、Fa-Jun Nan
DOI:10.1016/j.tetlet.2006.03.022
日期:2006.5
methodology allowing access to functionalized α-amino caprolactams using ring-closing metathesis (RCM). A very high tolerance of α-amino acrylamide RCM precursors toward functional groups is demonstrated. The synthetic pathway is facile, and can be extended to prepare a variety of substituted amino caprolactams in good to excellent yields. These compounds serve as versatile building blocks for the synthesis
values equal to or higher than 98% were obtained in the TiCl4-promoted allylation of the N-Pht-aminoacylsilanes 1 and 13 and of the N-Ts-aminoacylsilane 5 with allyltrimethylsilane. Lower de values were obtained in the Sc(OTf)3-catalyzedallylation of 5 with tetraallyltin and in the additions of both allyltrimethylsilane and tetraallyltin to the N-Ts-β-aminoacylsilane 16. Protiodesilylation of the adducts
Stereoselective Three-Carbon and Two-Carbon Elongation of the Carbon Chain in <i>N</i>-Boc-Protected α-Aminoacylsilanes: An Entry to Functionalized β-Amino Alcohols and to Statine Analogues