METHOD FOR PRODUCING OPTICALLY ACTIVE 2-(N-SUBSTITUTED AMINOMETHYL)-3-HYDROXYBUTYRIC ACID ESTER
申请人:Yasohara Yoshihiko
公开号:US20090104671A1
公开(公告)日:2009-04-23
The present invention relates to a method for producing optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid esters wherein a 2-(N-substituted aminomethyl)-3-oxobutyric acid ester is treated with an enzyme source capable of stereoselectively reducing said ester to the corresponding optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid ester having the (2S,3R) configuration. The present invention provides an efficient method for industrially producing optically active 2-(N-substituted aminomethyl)-3-hydroxybutyric acid esters, in particular such compounds having the (2S,3R) configuration, which are useful as intermediates for the production of medicinal compounds, among others.
Anti-androgenic activity of various phthalimide analogs was evaluated based on inhibition of androgen-induced activation of nuclear androgen receptor (CAT assay) and on growth inhibition of the androgen-dependent clonal cell Line SC-3. Some compounds showed very potent androgen-antagonistic activity. (C) 1997 Elsevier Science Ltd.
Cyclization−Cycloaddition Cascade of Rhodium Carbenoids Using Different Carbonyl Groups. Highlighting the Position of Interaction
作者:Albert Padwa、Zhijia J. Zhang、Lin Zhi
DOI:10.1021/jo000378f
日期:2000.8.1
carboxylate, were found to afford oxabicyclic dipolar cycloadducts derived by the trapping of a carbonylylide intermediate. The reaction involves generation of the 1,3-dipole by intramolecular cyclization of the keto carbenoid onto the oxygen atom of the neighboring keto group. Both five- and six-ring carbonylylides are formed with the same efficiency. A study of the tandem cyclization-cycloaddition