An asymmetric Meerwein-Ponndorf-Verley (MPV) reduction of glyoxylates was for the first time accomplished via an N,N'-dioxide/Y(OTf)3complex with aluminium alkoxide and molecular sieves (MSs) as crucial additives. A variety of optically active α-hydroxyesters were obtained with excellent results. A possible reaction mechanism was proposed based on the experiments.
Chemoselective synthesis of biheterocyclic skeletons tetrahydro-1H-pyrrolo[1,2-c]imidazole and tetrahydropyrrolo[1,2-c]thiazole derivatives via multicomponent self-sorting domino strategy
A highly efficient chemoselective synthesis of multifunctionalized tetrahydro-1H-pyrrolo[1,2-c]imidazole and tetrahydropyrrolo[1,2-c]thiazole derivatives has been established fromarylglyoxal monohydrates, nitriles, and thioureas. A series of control experiments suggested that this reaction proceeded through the convergent integration of two self-sorting domino sequences. This synthetic strategy is
从芳基乙二醛一水合物,腈和硫脲建立了多官能化四氢-1 H-吡咯并[1,2- c ]咪唑和四氢吡咯并[1,2 - c ]噻唑衍生物的高效化学选择性合成。一系列对照实验表明,该反应是通过两个自排序多米诺骨牌序列的融合整合而进行的。这种合成策略有望用于生物碱类似物的多样性导向合成。
FeCl<sub>3</sub>or MeSO<sub>3</sub>H-promoted multicomponent reactions for facile synthesis of structurally diverse furan analogues
作者:Xiangqing Chang、Xiongfei Zhang、Zhiwei Chen
DOI:10.1039/c8ob00942b
日期:——
An intriguing conversion of arylglyoxal, cyclic dicarbonyl compounds and phenols to diverse furan analogues under FeCl3 or MeSO3H catalysis is reported. Utilizing this synthetic protocol, a variety of furan analogues could be easily obtained in moderate to good yields with different substituted patterns by varying the reaction medium. Atom-economical characteristics and mild conditions of this method
p-TSA-catalyzed facile and efficient one-pot eco-friendly synthesis of novel isoxazolyl amino furo[3,2-c]quinolinone derivatives in aqueous medium
作者:Nagi Reddy Modugu、Praveen Kumar Pittala
DOI:10.1016/j.tetlet.2017.08.062
日期:2017.10
operationally simple approach for the synthesis of novel isoxazolyl amino furo[3,2-c]quinolinone derivatives by a one-pot three-component reaction of 4-amino-3-methyl-5 styrylisoxazoles, aryl glyoxal monohydrates and 4-hydroxy-1-methyl-2-quinolinone using p-TSA as the catalyst in aqueous medium was developed. The protocol proves to be an efficient and an environmentallybenign in terms of high yields, operational
通过4-氨基-3-甲基-5苯乙烯基恶唑,芳基乙二醛一水合物和4-水的一锅三组分反应合成新型异恶唑基氨基呋喃[3,2- c ]喹啉酮衍生物的绿色且操作简单的方法以p -TSA为催化剂,在水性介质中开发了羟基-1-甲基-2-喹啉酮。从高产率,操作简便,反应简捷,与各种底物的相容性,水作为溶剂和易于纯化等方面来看,该协议被证明是一种有效且对环境无害的方法。