Copper-Catalyzed Ligand-Free Diazidation of Olefins with TMSN<sub>3</sub> in CH<sub>3</sub>CN or in H<sub>2</sub>O
作者:Huan Zhou、Wujun Jian、Bo Qian、Changqing Ye、Daliang Li、Jing Zhou、Hongli Bao
DOI:10.1021/acs.orglett.7b02982
日期:2017.11.17
An environmentally benign, copper-catalyzed diazidation of a broad range of olefins, including vinylarenes, unactivated alkenes, allene, and dienes, under mild conditions with TMSN3 (trimethylazidosilane) as azido source, has been developed. This reaction can be carried out in organic solvent or in aqueous solution where water is the sole solvent. The functional group compatibility of this reaction
Transition metal-catalyzed dehydrogenation is a clean oxidation method requiring no additional oxidants. We have accomplished a heterogeneous Pd/C-catalyzed aqueous dehydrogenation of 1,4-cyclohexadienes and cyclohexenes to give the corresponding highly-functionalized arenes. Furthermore, various arenes could be efficiently constructed in a one-pot manner via a Diels–Alder reaction and the following
A practical and effective copper-catalyzed dehydrogenative Diels–Alderreaction of gem-diesters and ketone with dienes has been established. The active dienophiles were generated in situ via a radical-based dehydrogenation process, which reacted with a wide variety of dienes to afford various polysubstituted cyclohexene derivatives in good to excellent yields.
Compounds that modulate PPAR activity and methods for their preparation
申请人:——
公开号:US20030225158A1
公开(公告)日:2003-12-04
This invention discloses compounds that alter PPAR activity. The invention also discloses pharmaceutically acceptable salts of the compounds, pharmaceutically acceptable compositions comprising the compounds or their salts, and methods of using them as therapeutic agents for treating or preventing disipidemia, hypercholesteremia, obesity, eating disorders, hyperglycemia, atherosclerosis, hypertriglyceridemia, hyperinsulinemia and diabetes in a mammal as well as methods of supressing appetite and modulating leptin levels in a mammal. The present invention also discloses methods for making the disclosed compounds.
Ruthenium porphyrin catalysed intermolecular amino-oxyarylation of alkenes to give primary amines <i>via</i> a ruthenium nitrido intermediate
作者:Daohong Yu、Ka-Pan Shing、Yungen Liu、Haiyang Liu、Chi-Ming Che
DOI:10.1039/c9cc08043k
日期:——
Ruthenium porphyrin catalysed direct intermolecular amino-oxyarylation of alkenes including styrenes and 1,3-dienes to give primaryamines with O-(2,4-dinitrophenyl)hydroxylamine as the amine source was achieved in moderate to good yields under mild reaction conditions. Spectroscopic analyses revealed that a ruthenium nitrido complex was the key reaction intermediate for the amino-oxyarylation reaction