Stereoselective Synthesis of Optically Active α-Hydroxy Ketones and <i>a</i><i>nti</i>-1,2-Diols via Asymmetric Transfer Hydrogenation of Unsymmetrically Substituted 1,2-Diketones
作者:Takashi Koike、Kunihiko Murata、Takao Ikariya
DOI:10.1021/ol0002572
日期:2000.11.1
[reaction: see text] A well-defined chiral Ru catalyst RuCl(N-(p-toluenesulfonyl)-1, 2-diphenylethylenediamine)(eta(6)-arene) effectively promotes asymmetric transfer hydrogenation of 1-aryl-1,2-propanedione with HCOOH/N(C(2)H(5))(3), leading preferentially to opticallyactive 1-aryl-2-hydroxy-1-propanone with up to 99% ee and 89% yield at 10 degrees C. The reaction at 40 degrees C gives anti-1-aryl-1
A rational approach to chiral α-hydroxy aryl ketones from chiral aryl epoxides via regioselective, stereo retentive oxidative epoxide opening: Its application to the synthesis of antifungal Sch 42427/SM 9164
作者:Dinesh Gala、Donald J. DiBenedetto
DOI:10.1016/s0040-4039(00)74391-7
日期:1994.11
to hydroxy-protected chiral α-hydroxy aryl ketones with complete retention of the chiral center and good regioselectivity has been established. An application of this new reaction to the synthesis of antifungalSch 42427/SM 9164 is also described.
建立了一种新的,温和的方法,用于将手性芳基环氧化物直接转化为羟基保护的手性α-羟基芳基酮,同时完全保留手性中心并具有良好的区域选择性。还描述了该新反应在合成抗真菌Sch 42427 / SM 9164中的应用。
PROCESS FOR PRODUCING EPOXYTRIAZOLE COMPOUND AND INTERMEDIATE THEREFOR