Efficient Preparation of Biologically Important 1,2-Amino Alcohols
摘要:
An efficient three-step methodology developed for the preparation of 1,2-amino alcohols. In the first step a rapid coupling between bromoketones and potassium phthalimide in ionic liquid produced alpha-phthalimido ketones in quantitative yields, which is followed by a facile reduction using NaCNBH3 in acetic acid to give corresponding phthalimido alcohols and finally effecting hydrazinolysis in water at 60 degrees C to yield biologically important 1,2-amino alcohols.
Highly Enantioselective Asymmetric Hydrogenation of α-Phthalimide Ketone: An Efficient Entry to Enantiomerically Pure Amino Alcohols
作者:Aiwen Lei、Shulin Wu、Minsheng He、Xumu Zhang
DOI:10.1021/ja039153n
日期:2004.2.1
A new type of alpha-phthalimide ketones was hydrogenated in excellent enantioselectivity by using a Ru-(C3-TunePhos) complex as the catalyst. Up to 10 000 turnovers have been achieved in more than 99% ee in the hydrogenation reaction. A dynamic kinetic resolution study for the synthesis of threonine was performed, and high anti selectivity (>97:3) was observed for the first time. An efficient method
以Ru-(C3-TunePhos)配合物为催化剂,以优异的对映选择性氢化一种新型α-邻苯二甲酰亚胺酮。在氢化反应中,超过 99% ee 的转化率达到了 10 000 次。对苏氨酸的合成进行了动态动力学拆分研究,首次观察到了高抗选择性(>97:3)。已开发出一种合成对映体纯氨基醇的有效方法。
Nucleophilic Aminomethylation of Aldehydes with α-Amino Alkylsilanes
作者:Otohiko Tsuge、Junji Tanaka、Shuji Kanemasa
DOI:10.1246/bcsj.58.1991
日期:1985.7
Fluoride-induced desilylation of (α-phthalimido-, α-morpholino-, and α-acetamidobenzyl)silanes and a (phthalimidomethyl)silane generates the corresponding α-amino carbanions which add to a variety of aldehydes. The conversion of phthalimido group of the adducts into amino moiety leads to β-amino alcohols. This simple reaction sequence offers a new and general method of nucleophilic aminomethylation.