Synthesis of 1-Cyanoalkynes and Their Ruthenium(II)-Catalyzed Cycloaddition with Organic Azides to Afford 4-Cyano-1,2,3-triazoles
作者:Peiye Liu、Ronald J. Clark、Lei Zhu
DOI:10.1021/acs.joc.8b00424
日期:2018.5.4
terminal alkynes in the ruthenium(II)-catalyzed regiospecific azide–alkyne cycloaddition to afford 4-cyano-1,2,3-triazoles. A mechanistic proposal different from the one that terminal alkynes adopt under the same reaction conditions is proposed. This work provides a new and convenient two-step sequence to prepare 4-cyano-1,2,3-triazoles from terminal alkynes and organicazides.
A Cu(ii)-catalyzed direct cyanation of terminal alkynes was reported with broad substrate generality in moderate to high yield.
一种Cu(II)催化的直接炔烃氰化反应报道了广泛的底物适用性,产率在中到高收率范围内。
US5162360A
申请人:——
公开号:US5162360A
公开(公告)日:1992-11-10
Heterocyclic Ureas: Inhibitors of Acyl-CoA:Cholesterol <i>O</i>-Acyltransferase as Hypocholesterolemic Agents
作者:Andrew D. White、Mark W. Creswell、Alexander W. Chucholowski、C. John Blankley、Michael W. Wilson、Richard F. Bousley、Arnold D. Essenburg、Katherine L. Hamelehle、Brian R. Krause、Richard L. Stanfield、Mark A. Dominick、Martin Neub
DOI:10.1021/jm960404v
日期:1996.1.1
series of diaryl-substituted heterocyclicureas was prepared, and their ability to inhibit acyl-CoA: cholesterol O-acyltransferase (ACAT) in vitro and to lower plasma total cholesterol in cholesterol-fed animal models in vivo was examined. N-(2,6-Diisopropylphenyl)-N'-tetrazole or isoxazole-substituted heterocyclicureas proved optimal. A carbon chain of 11-14 carbons substituted 1,3 with respect to the
A copper-catalyzed reaction of terminal alkynes with cyanogen iodide (ICN) that produces alkynyl cyanides has been developed. The use of tetramethylpiperidine as a sterically congested base was successful in this reaction. Some control experiments revealed that the reaction involves the noncatalyzed formation of alkynyl iodides followed by copper-catalyzed cyanation of the iodides without the formation