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。