Oxidative cleavage of the C–C bond of 3,6-dialkylcyclohexane-1,2-diones by cell suspension cultures of Marchantia polymorpha
摘要:
Biotransformation of 3,6-dialkylcyclohexane-1,2-diones by cell suspension cultures of Marchantia polymorpha involves regioselective oxidative cleavage of the C-C bond to give the corresponding oxocarboxylic acids shortened by one carbon unit. In the case of cyclohexane-1,2-dione, adipic acid was obtained. (C) 2002 Elsevier Science Ltd. All rights, reserved.
Directing Group in Decarboxylative Cross-Coupling: Copper-Catalyzed Site-Selective C–N Bond Formation from Nonactivated Aliphatic Carboxylic Acids
作者:Zhao-Jing Liu、Xi Lu、Guan Wang、Lei Li、Wei-Tao Jiang、Yu-Dong Wang、Bin Xiao、Yao Fu
DOI:10.1021/jacs.6b05788
日期:2016.8.3
Copper-catalyzed directed decarboxylative amination of nonactivated aliphatic carboxylic acids is described. This intramolecular C-N bond formation reaction provides efficient access to the synthesis of pyrrolidine and piperidine derivatives as well as the modification of complex natural products. Moreover, this reaction presents excellent site-selectivity in the C-N bond formation step through the
Lactone Radical Cyclizations and Cyclization Cascades Mediated by SmI<sub>2</sub>–H<sub>2</sub>O
作者:Dixit Parmar、Hiroshi Matsubara、Kieran Price、Malcolm Spain、David J. Procter
DOI:10.1021/ja3047975
日期:2012.8.1
Unsaturated lactones undergo reductive radicalcyclizations upon treatment with SmI(2)-H(2)O to give decorated cycloheptanes in a single highly selective operation during which up to three contiguous stereocenters are generated. Furthermore, cascade processes involving lactones bearing two alkenes, an alkene and an alkyne, or an allene and an alkene allow "one-pot" access to biologically significant
Chemoselective cross-coupling reactions of monoesters of dicarboxylic acid chlorides with organocopperreagentsderivedfrom Grignard reagents, cuprousbromide, and lithiumbromide, provide a simple and straightforward method for synthesizing a variety of ketoesters.
A New Entry to 1,5-Keto Esters and Their 4,4-Dideuterio Derivatives via Methylene Chloride as “Methylene Dianion” Equivalents
作者:Kuo-Wei Lin、Cheng-Yih Chen、Wei-Fan Chen、Tu-Hsin Yan
DOI:10.1021/jo800732s
日期:2008.6.1
This TiCl4−Mg promoted multicomponent coupling of various amides with CH2Cl2 and methyl acrylate represents an extremely simple and practical synthesis of 1,5-keto esters. The efficiency of this chemistry is illustrated by the very simple preparation of unusual 4,4-dideuterio-1,5-keto esters.
作者:Xiaolu Jiang、Emma K. London、David J. Morris、Guy J. Clarkson、Martin Wills
DOI:10.1016/j.tet.2010.10.068
日期:2010.12
Gold(I) and (III) salts have been found to be highly effective at the catalysis of etherformation from alcohols. Intramolecular etherformation of a 1,5-diol was also achieved, with a stereoselectivity that indicates that an SN1 mechanism predominates. In an attempt to form a seven-membered ring, a stable 14-membered dimer product was also formed. Attempts to control the diastereoselectivity of the
已经发现金(I)和(III)盐在催化由醇形成醚方面非常有效。还实现了1,5-二醇的分子内醚形成,其立体选择性表明S N 1机制占主导。为了形成七元环,还形成了稳定的十四元二聚产物。尝试使用手性阴离子抗衡离子控制反应的非对映选择性没有得到具有高de的产物。