The synthesis of silafluorene derivativesfrom aminobiphenyl compounds and dihydrosilanes via a double sila-Friedel–Crafts reaction using a borane catalyst has been achieved. This method is applicable to the synthesis of a variety of silafluorene derivatives, such as multisubstituted silafluorenes, spirosilabifluorenes, and silicon-bridged terphenyl compounds, which are not readily obtained using conventional
New Atglistatin closely related analogues: Synthesis and structure-activity relationship towards adipose triglyceride lipase inhibition
作者:Pierre-Philippe Roy、Kenneth D'Souza、Miroslava Cuperlovic-Culf、Petra C. Kienesberger、Mohamed Touaibia
DOI:10.1016/j.ejmech.2016.04.021
日期:2016.8
Adipose TriglycerideLipase (ATGL) performs the first and rate-limiting step in lipolysis by hydrolyzing triacylglycerols stored in lipid droplets to diacylglycerols. By mediating lipolysis in adipose and non-adipose tissues, ATGL is a major regulator of overall energy metabolism and plasma lipid levels. Since chronically high levels of plasma lipids are linked to metabolic disorders including insulin
Synthesis of fluorenes and their related compounds from biaryls and Meldrum's acid derivatives
作者:Zhiyan Jiang、Kohei Sekine、Yoichiro Kuninobu
DOI:10.1039/d1cc06212c
日期:——
A new synthetic method for preparing fluorenes from amino group-containing biaryls and Meldrum's acid derivatives was developed. The reaction proceeded without a catalyst and loss of functional groups. The corresponding six- and seven-membered cyclic products were obtained using biaryl ether and ortho-terphenyl as substrates, respectively.
Manganese-catalyzed oxidative homo-coupling of aryl Grignard chlorides
作者:Zhiming Zhou、Weizhe Xue
DOI:10.1016/j.jorganchem.2008.12.021
日期:2009.3
Manganese-catalyzed homo-coupling of aryl magnesium chlorides to give biphenyls was successfully achieved using manganese chloride as catalyst. A variety of aryl magnesium chlorides were efficiently converted into the corresponding symmetrical biaryls using 10 mol% MnCl2 as catalyst in the presence of a stoichiometric amount of 1,2-dichloroethane. Since the aryl chlorides, from which the Grignard reagents