Biginelli-Like Cyclocondensation Reaction: Efficient Synthesis of 4,6-Diarylpyrimidin-2(1<i>H</i>)-one Under Solvent-Free Conditions
作者:Yisi Dai、Minxiang Cao、Mengjie Zhuang、Sheng Xia、Shujiang Tu、Liangce Rong
DOI:10.1080/00397911.2010.516619
日期:2011.10.15
Abstract An efficient and facile synthesis of 4,6-diarylpyrimidin-2(1H)-one via a Biginelli-like reaction of aromatic aldehydes, aromatic ketones, and urea in the presence of NaOH undersolvent-free conditions using a heating method has been developed. Compared with the classical reaction conditions, this new synthetic method has the advantages of excellent yields, shorter reaction time, and mild reaction
Highly effectual synthesis of 4,6-diarylpyrimidin-2(1<i>H</i>)-ones using <i>N</i>,<i>N</i>,<i>N</i>′,<i>N</i>′-tetramethylethylenediaminium-<i>N</i>,<i>N</i>′-disulfonic acid hydrogen sulfate as a dual-functional catalyst
作者:Roghayyeh Khanivar、Abdolkarim Zare
DOI:10.1515/znb-2018-0075
日期:2018.9.25
Abstract The highly effectual synthesis of 4,6-diarylpyrimidin-2(1H)-ones via the one-pot multicomponent reaction of acetophenones with arylaldehydes and urea in the presence of trimethylsilyl chloride and a catalytic amount of the ionicliquid N,N,N′,N′-tetramethylethylenediaminium-N,N′-disulfonic acidhydrogensulfate ([TMEDSA][HSO4]2) under solvent-free conditions has been described. The reaction
Synthesis of 4,6-diarylpyrimidin-2(1<i>H</i>)-one derivatives from benzyl halides and (1-bromoethyl)benzene under solvent-free conditions
作者:Mallappa Beerappa、Kalegowda Shivashankar
DOI:10.1080/00397911.2018.1479757
日期:2018.9.2
Abstract A facile synthesis of a series of pyrimidinone derivatives from the reaction of benzyl halides, (1-bromoethyl)benzene and urea in the presence of pyridine N-oxide (PNO) undersolvent-freeconditions is described. This transformation presumeably occurs via oxidation/cross-aldol condensation/Michael addition/intra molecular cyclization, domino sequence, involving the formation of one C–C bond