Stereocontrolled Formation of Amino Acids and <i>N</i>-Heterocycles Bearing a Quaternary Chiral Carbon
作者:Stéphanie Roy、Claude Spino
DOI:10.1021/ol053061g
日期:2006.3.2
Stereocontrolled formation of tertiary or quaternary chiral carbons bearing nitrogen was achieved using the [3,3]-sigmatropic rearrangement of cyanate to isocyanate as a key element. A short and highly selective sequence of reactions, starting from p-menthane-3-carboxaldehyde, was developed leading to alpha,alpha-dialkylated alpha-amino acids or N-heterocycles, depending on the method of cleavage of
使用氰酸酯到异氰酸酯的[3,3]-σ重排作为关键元素,可实现立体控制的含氮叔或四级手性碳的形成。根据对辅助物的裂解方法,从对薄荷烷-3-甲醛开始的短而高度选择性的反应序列被开发出来,导致产生α,α-二烷基化的α-氨基酸或N-杂环。