Development of the Ireland−Claisen Rearrangement of Alkoxy- and Aryloxy-Substituted Allyl Glycinates
作者:James P. Tellam、David R. Carbery
DOI:10.1021/jo1017124
日期:2010.11.19
The Ireland−Claisen rearrangement of 3-alkoxy- and 3-aryloxy-substituted allyl glycinates is presented. This [3,3]-sigmatropic rearrangement route offers direct access to syn β-alkoxy and β-aryloxy α-amino acid systems. In particular, N,N-diboc glycine esters rearrange with excellent diastereoselectivities (dr > 25:1). The synthesis of substrates, rearrangement optimization, and a discussion of stereoselection
提出了3-烷氧基和3-芳氧基取代的烯丙基甘氨酸盐的爱尔兰-克莱森重排。该[3,3] -sigmatropic重排途径可直接进入顺式β-烷氧基和β-芳氧基α-氨基酸系统。特别地,N,N-二boc甘氨酸酯以优异的非对映选择性(dr> 25:1)重新排列。介绍了底物的合成,重排优化和立体选择的讨论。