1-Alkoxyallene as an Effective Precursor for Regio- and Stereocontrolled Allylation Reactions with Aliphatic Aldehydes via Bis-Stannylation
作者:David R. Williams、Micheal W. Fultz
DOI:10.1021/ja054201k
日期:2005.10.1
Bis-stannylation of 1-(methoxy)methoxyallene yields (E)-(3-(methoxymethoxy)prop-2-ene-1,2-diyl) bis-tributylstannane (2) as a highly reactive allylation reagent. Stereoselective reactions of functionalized stannane 2 with a variety of aldehydes provide good yields of 1,2-diol derivatives. Reactions with alpha-alkoxyaldehydes proceed with chelation-controlled addition to afford efficient constructions
1-(甲氧基)甲氧基丙二烯的双-甲锡烷基化产生(E)-(3-(甲氧基甲氧基)丙-2-烯-1,2-二基)双-三丁基锡烷(2)作为高反应性烯丙基化试剂。官能化锡烷 2 与各种醛的立体选择性反应提供了良好的 1,2-二醇衍生物产率。与 α-烷氧基醛的反应通过螯合控制加成进行,以在带有三个不同氧(烷氧基和羟基)取代基的立体三联体中有效构建 3,4-反-4,5-syn-关系。提出了机械方面的考虑,核磁共振实验的衍生物支持立体化学分配。包括 X 射线衍射研究。