Stereoselective reduction of unsaturated 1,4-diketones. A practical route to chiral 1,4-diols
作者:Jordi Bach、Ramon Berenguer、Jordi Garcia、Teresa Loscertales、Judith Manzanal、Jaume Vilarrasa
DOI:10.1016/s0040-4039(96)02476-8
日期:1997.2
synthetic route to C2-symmetric chiral 1,4-diols based on the borane-mediated oxazaborolidine-catalysed reduction of 2-ene-1,4-diones (2), of 2-yne-1,4-diones (3), and/or of Co-complexed diketones 4 is described. Good to excellent enantio- and diastereoselectivities have been obtained in the reduction of diketones 3 and 4, catalysed by oxazaborolidines 6 and 5, respectively.
基于硼烷介导的恶唑硼烷催化的2-烯-1,4-二酮(2),2-炔-1,4-二酮(2)还原反应的合成C 2对称手性1,4-二醇的新合成路线描述3)和/或共络二酮4。对二酮3和4的还原分别获得了良好或优异的对映异构和非对映异构选择性,分别由恶唑硼烷6和5催化。