The selectiveoxidation of alcohol-d1 to prepare aldehyde-d1 was newly developed by means of NaBD4 reduction/activated MnO2 oxidation. Various aldehyde-d1 derivatives including aromatic and unsaturated aldehyde-d1 can be prepared with a high deuterium incorporation ratio (up to 98% D). Halogens (chloride, bromide, and iodide), alkene, alkyne, ester, nitro, and cyano groups in the substrates are tolerated
Synthesis of optically active benzyl-α-d alcohols by asymmetric hydrogenation of benzaldehyde-α- d and its derivatives catalysed by BINAP-Ru(II) complexes
作者:Tetsuo Ohta、Takaharu Tsutsumi、Hidemasa Takaya
DOI:10.1016/0022-328x(94)87204-x
日期:1994.12
Opticallyactive benzyl-α-d alcohols have been synthesized in up to 89% ee by asymmetric hydrogenation of benzaldehyde-α-d and its derivatives catalysed by BINAP-Ru(II) complexes. A remarkable enhancement in enantioselectivities has been observed for o-bromo- and o- methoxy-benzaldehyde-d, but moderate enantioselectivities for o-methyl and other m- and p-substituted derivatives.