Synthesis and Reactions of 2-Substituted Ethyl <i>N</i>-Alkylmalonylhydroxamic Acids
作者:Robert V. Hoffman、Sachin Madan
DOI:10.1021/jo0300690
日期:2003.6.1
Alkylation of O-silylated N-alkylmalonylhydroxamic acids provides a method for the synthesis of 2-substituted N-alkylmalonyl hydroxamic acids. The substituent at C-2 does not materially change the chemistry of the alpha-lactam intermediates produced from them. They can be converted to unsymmetric ureas and hydantoins in high yields. The addition of unsaturated substituents at C-2 is used to produce
O-甲硅烷基化的N-烷基丙二酸异羟肟酸的烷基化提供了一种合成2-取代的N-烷基丙二酸异羟肟酸的方法。C-2处的取代基不会实质性地改变由此产生的α-内酰胺中间体的化学性质。它们可以高产率转化为不对称的脲和乙内酰脲。在C-2处添加不饱和取代基用于通过RCM反应生成含中环的环状脲。