Diastereoselective and Enantiospecific Synthesis of 1,3-Diamines via 2-Azaallyl Anion Benzylic Ring-Opening of Aziridines
作者:Kangnan Li、Alexandria E. Weber、Luke Tseng、Steven J. Malcolmson
DOI:10.1021/acs.orglett.7b01886
日期:2017.8.18
Herein, we demonstrate a stereocontrolled synthesis of 1,3-diamines, which bear up to three contiguous stereogenic centers, through benzylic ring-opening of aziridines with 2-azaallyl anion nucleophiles. Reactions proceed efficiently (yield up to 95%), diastereoselectively (dr up to >20:1), site selectively, and enantiospecifically to deliver products with differentiated amino groups.
1,3-二胺基序出现在许多复杂的分子中,但是很少有方法可以立体选择性地构建该部分。在本文中,我们证明了通过具有2-氮杂烯丙基阴离子亲核试剂的氮丙啶的苄基开环,可立体控制合成1,3-二胺,其最多包含三个连续的立体生成中心。反应进行高效(产率高达95%),非对映选择性(dr高达> 20:1),选择性位点和对映体特异性,以递送具有分化氨基的产物。