Flexible and stereoselective construction of polypropionate chains from enantiomerically pure γ-hydroxy-α,β-unsaturated sulfones
作者:Esteban Domínguez、Juan C. Carretero
DOI:10.1016/s0040-4020(01)90483-1
日期:——
the readily available enantiomerically pure γ-hydroxy vinyl sulfone 2 has been transformed, with complete control of the stereochemistry, into γ-hydroxy vinyl sulfones of polypropionate structure. The four stereotriads have been prepared by stereoselective additions of organometallics to the vinyl sulfone moiety and by stereoselective reduction of β-hydroxyketones. In a similar way, these triads are the
按照同源序列,在完全控制立体化学的情况下,容易获得的对映体纯的γ-羟基乙烯基砜2已转化为聚丙烯酸酯结构的γ-羟基乙烯基砜。通过将有机金属化合物立体选择性地添加到乙烯基砜部分并通过立体选择性地还原β-羟基酮来制备了四种立体三单元组。以类似的方式,这些三重轴是用于立体选择性地引入第四连续的不对称中心的底物。