Enantioselective synthesis of α-hydroxy thioesters via oxazaborolidine-mediated reduction of α-phenylthio enones
作者:Ramon Berenguer、Marta Cavero、Jordi Garcia、Montse Muñoz
DOI:10.1016/s0040-4039(98)00170-1
日期:1998.4
α-Phenylthio-α,β-alkenones (2), readily available by Pd(II)-catalysed coupling of (E)-1-phenylthio-1-tributylstannylhex-1-ene with the corresponding acid chlorides, have been treated with borane in the presence of phenylglycine- or proline-derived oxazaborolidines to afford 2-phenylthio-2-alken-1-ols (3) with good to excellent enantioselectivities. Ozonolysis of 3 provides a new and efficient route
α-苯硫基-α,β-烯酮(2)已通过硼烷处理,可通过钯(II)催化(E)-1-苯硫基-1-三丁基锡烷基己基己烯-1-烯与相应的酰氯偶联而得到。在苯基甘氨酸或脯氨酸衍生的恶唑硼烷存在下,得到具有良好对映选择性的2-苯基硫-2-烯-1-醇(3)。3的臭氧分解为手性α-羟基硫酯4提供了一种新的有效途径。