Asymmetric synthesis of aryloxypropanolamines via OsO4-catalyzed asymmetric dihydroxylation
作者:Iliyas A. Sayyed、Vinay V. Thakur、Milind D. Nikalje、Gajanan K. Dewkar、S.P. Kotkar、A. Sudalai
DOI:10.1016/j.tet.2005.01.074
日期:2005.3
effective procedure for the enantioselective synthesis of several β-adrenergic blocking agents incorporating the first asymmetric synthesis of celiprolol, is described. The key steps are (i) sharpless asymmetric dihydroxylation of aryl allyl ethers to introduce chirality into the molecules and (ii) conversion of cyclic sulfates into the corresponding epoxides using a three-step procedure.
描述了一种简单有效的方法,该方法包括对映异构体合成首个不对称合成西酞洛尔的β-肾上腺素能阻断剂。关键步骤是(i)芳基烯丙基醚无尖锐的不对称二羟基化反应,以将手性引入分子中;以及(ii)使用三步法将环状硫酸盐转化为相应的环氧化物。