Synthesis of lactams using enzyme-catalyzed aminolysis
作者:E. Stavila、K. Loos
DOI:10.1016/j.tetlet.2012.10.133
日期:2013.1
The formation of e-caprolactam from 6-aminocaproic acid catalyzed by CALB (N435) is reported. Different lactam ring sizes can be prepared starting from 4-aminobutanoic acid, 5-aminovaleric acid, and 8-aminooctanoic acid. Experiments with mixtures of aminocarboxylic acids have shown that CALB prefers homocyclization of the individual aminocarboxylic acids. (C) 2012 Elsevier Ltd. All rights reserved.
Incorporation of La<sup>3+</sup>in an Organic Network. A Polyphenol-Derived Solid Brønsted-Base Catalyst
作者:Toshiyuki Saiki、Yasuhiro Aoyama
DOI:10.1246/cl.1999.797
日期:1999.8
Treatment of anthracenebisresorcinol 1 (a tetraphenol) with La(OiPr)3 in THF affords an amorphous 1:2 (14− to La3+) coordination polymer (La host). It catalyzes typical base-promoted reactions such as Michael, nitroaldol, and, less effectively, aldol reactions, where the insoluble catalyst (La host) can be readily recovered and repeatedly used.