An efficient and environmentally benign electrosynthesis of 2,5‐disubstituted 1,3,4‐oxadiazoles from α‐ketoacids and acylhydrazines under metal‐free and external oxidant free conditions has been developed. A broad range of acylhydrazines and α‐ketoacids were compatible, and the reaction could be conducted in gram scale with high reaction efficiency.
An efficient one-pot palladium-catalyzed reaction for the synthesis of diazoles from readily available hydrazides and aryl halide via isocyanide insertion/cyclization sequence has been developed.
One-pot cyclization/decarboxylation of α-keto acids and acylhydrazines for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles under transition-metal-free conditions
作者:Peng Gao、Juan Wang、Zijing Bai、Hualei Cheng、Jian Xiao、Mengnan Lai、Desuo Yang、Mingjin Fan
DOI:10.1016/j.tetlet.2016.09.007
日期:2016.10
A one-pot KI/TBHP-mediated oxidative cyclization of α-ketoacids with acylhydrazines was developed. A series of functional 2,5-disubstituted 1,3,4-oxadiazoles were synthesized through a tandem keto amine condensation followed by oxidative cyclization and decarboxylation reactions. This procedure was achieved under transition-metal-free conditions and showed advantages including readily available materials
EMISSIVE COMPOUNDS FOR ORGANIC LIGHT-EMITTING DIODES
申请人:Froehlich Jesse Dan
公开号:US20130087772A1
公开(公告)日:2013-04-11
Disclosed herein are compounds comprising an optionally substituted (2-phenylpyridinato-N,C2′)(2,4-pentanedionato)Pt(II). Some embodiments provide a light-emitting device, comprising: an anode layer; a cathode layer; and a light-emitting layer positioned between, and electrically connected to, the anode layer and the cathode layer, wherein the light-emitting layer comprises a compound disclosed herein.
Ligand-free Cu(<scp>ii</scp>)-mediated aerobic oxidations of aldehyde hydrazones leading to N,N′-diacylhydrazines and 1,3,4-oxadiazoles
作者:Lei Liu、Suliu Feng
DOI:10.1039/c7ob00042a
日期:——
A Cu(II)-mediated synthesis of N,N′-diacylhydrazines and 1,3,4-oxadiazoles from aldehyde hydrazones has been developed. This is the first time that the synthesis of N,N′-diacylhydrazines and 1,3,4-oxadiazoles using N,N-dimethylamides as the acylation reagent and O2 in air as the oxidation reagent is reported. These reactions offered several advantages including simple workups, ligand-free inexpensive