Synthesis of a protected enantiomerically pure 2-deoxystreptamine derivative from d-allylglycine
作者:Guuske F. Busscher、Floris P.J.T. Rutjes、Floris L. van Delft
DOI:10.1016/j.tetlet.2004.03.051
日期:2004.4
d-allylglycine to the enantiopure (protected) 2-deoxystreptamine derivative 14 is presented. Key steps involve two consecutive chain extensions––with crucial stereodirective roles for the amino protective groups, ring closure by olefin metathesis, face selective dihydroxylation, cyclic sulfate formation and finally opening with azide. The resulting 2-deoxystreptamine derivative is ideally protected for the preparation
提出了从d-烯丙基甘氨酸到对映纯(保护的)2-脱氧链胺衍生物14的非对映选择性合成途径。关键步骤涉及两个连续的链延伸-氨基保护基团具有至关重要的立体定向作用,烯烃复分解产生的闭环,表面选择性二羟基化,形成环状硫酸盐,最后被叠氮化物打开。理想地保护所得的2-脱氧链胺胺衍生物以制备4,5-或4,6-连接的氨基糖苷抗生素。