A Highly Stereoselective Synthesis of Optically Active Trisubstituted 1,2-Ethylenediamines: The First Example of Grignard Addition to <i>N</i>-Diphenylphosphinoyl Ketimines Derived from Amino Acids
作者:Yoshinori Kohmura、Toshiaki Mase
DOI:10.1021/jo049405i
日期:2004.9.1
trisubstituted 1,2-ethylenediamines is described. Addition of aryl and/or alkyl Grignard reagents to α-amino N-diphenylphosphinoyl ketimines derived from α-amino acids was demonstrated to afford the desired trisubstituted 1,2-ethylenediamines in good yields and with high diastereoselectivities. Subsequent removal of the diphenyphosphinoyl group from the adduct was smoothly accomplished in reasonable
描述了光学活性的三取代的1,2-亚乙基二胺的有效合成。已证明将芳基和/或烷基格氏试剂添加到衍生自α-氨基酸的α-氨基N-二苯基膦酰基酮亚胺中,可以以良好的收率和高的非对映选择性提供所需的三取代的1,2-乙二胺。随后在新开发的还原条件下,以合理的收率顺利完成了从加合物中除去二苯膦酰基的合成,而没有外消旋作用。