Catalyst-Dependent Chemoselective Formal Insertion of Diazo Compounds into C−C or C−H Bonds of 1,3-Dicarbonyl Compounds
作者:Zhaohong Liu、Paramasivam Sivaguru、Giuseppe Zanoni、Edward A. Anderson、Xihe Bi
DOI:10.1002/anie.201802834
日期:2018.7.16
one‐carbon insertion of diazo compounds into the C−C or C−H bonds of 1,3‐dicarbonyl species is reported. In the presence of silver(I) triflate, diazo insertion into the C(=O)−C bond of the 1,3‐dicarbonyl substrate leads to a 1,4‐dicarbonyl product containing an all‐carbon α‐quaternary center. This reaction constitutes the first example of an insertion of diazo‐derived carbenoids into acyclic C−C bonds. When
Sc(OTf)3‐Catalyzed Synthesis of 3‐Substituted Lawsones through a Buchner‐Curtius‐Schlotterbeck Reaction
作者:Sailam Sri Gogula、Dasari Vijaya Prasanna、B. Sridhar、Ch. Abraham Lincoln、P. Muralidhar Reddy、B. V. Subba Reddy
DOI:10.1002/ejoc.202400362
日期:2024.8.19
An efficient method has been developed for the synthesis of 3-substituted lawsones using 10 mol % Sc(OTf)3 in toluene at −78 °C through a Buchner-Curtius-Schlotterbeck reaction. This method is simple and convenient to the synthesis of pharmaceutically relevant 3-substituted lawsones in high to excellent yields.
开发了一种有效的方法,使用 10 mol% Sc(OTf) 3在甲苯中,在 -78 °C 下通过布赫纳-库尔蒂斯-施洛特贝克反应合成 3-取代的指甲花酮。该方法简单方便,可以高收率合成药学相关的3-取代指甲花酮。