A Convenient Synthesis of 3,7′-Bisindole Derivatives
作者:Teng Liu、Hong-You Zhu、Da-Yun Luo、Sheng-Jiao Yan、Jun Lin
DOI:10.3390/molecules21050638
日期:——
An efficient and convenient method to synthesize highly functionalized 3,7'-bisindole derivatives has been developed via a Michael addition and cyclic condensation reaction of heterocyclic ketene aminals (HKAs) with 2-(1H-indol-3-yl)cyclohexa-2,5-diene-1,4-dione derivatives in ethanol-based solvents at room temperature. This strategy provides an efficient, environmentally friendly approach for easy
Three Component Solvent-free Synthesis of Chroman-2,4-dione-based Heterocyclic Ketene Aminal (HKA) Derivatives by "GAP" Chemistry
作者:Fu-Chao Yu、Xiao-Pan Hao、Xiu-Yang Jiang、Sheng-Jiao Yan、Jun Lin
DOI:10.5012/bkcs.2014.35.6.1625
日期:2014.6.20
A concise and efficient one-pot synthesis of chroman-2,4-dione-based HKA derivatives by three component reaction of HKAs, triethoxymethane and 4-hydroxycoumarin derivatives under solvent-free and catalyst-free conditions is described. This protocol has many advantages, in that the GAP (Group-Assistant-Purification) chemistry process is involved in this method. As a result, the experimenter can avoid cumbersome process steps such as traditional chromatography and recrystallization purifications. The desired products can be easily obtained by washing the crude products with 95% EtOH.
Three component solvent-free synthesis of 1H-pyrazol-5(4H)-one-based heterocyclic ketene aminal derivatives
作者:Fuchao Yu、Zhiqiong Chen、Xiaopan Hao、Xiuyang Jiang、Shengjiao Yan、Jun Lin
DOI:10.1039/c3ra41547c
日期:——
An efficient one-pot three-component synthesis of novel 1H-pyrazol-5(4H)-one-based heterocyclic ketene aminal libraries was performed by simply refluxing a mixture of heterocyclic ketene aminals (HKAs), 1-phenyl-1H-pyrazol-5(4H)-ones and triethoxymethane under solvent-free and catalyst-free conditions. The protocol has the advantages of being highly efficient and environmentally benign, with excellent
Silver(I)-mediated coupling reaction of heterocyclic ketene aminals (HKAs) with bis(phenylsulfonyl)sulfides to synthesis of benzenesulfonothioyl-HKAs
作者:Ting-Ting Liu、Xin-Rong Lin、Rong Huang、Li-Fen Yang、Sheng-Jiao Yan、Jun Lin
DOI:10.1016/j.tet.2014.09.094
日期:2014.11
An efficient and convenient method was developed for the preparation of 2-benzenesulfonothiol-HKAs via a silver(I)-mediated direct sulfenylation of heterocyclic ketene aminals (HKAs). The method involves a variety of functionalized substrates, leading to α-arylthioyl HKAs in a mild, easy operation, and mild reaction conditions.
Catalyst-free three-component domino reactions for regioselective synthesis of multi-functional fused pyrroles
作者:Xue-Bing Chen、Sheng-Jiao Yan、An Su、Wei Liu、Jun Lin
DOI:10.1016/j.tet.2015.05.067
日期:2015.7
A three-component domino [3+2] cyclization for the synthesis of new multi-functional fused pyrroles has been developed via reaction of heterocyclic ketene aminals (HKAs) 1 with arylglyoxal monohydrates 2 and 1,3-diphenylpropane-1,3-dione 3 under catalyst-free conditions in ethanol. In the one-step domino reaction, one C-N bond and two C-C bonds were formed and one C-C bond was cleaved. The established protocol is advantageous in providing excellent regioselectivity and concise one-pot methodology with the use of environmentally friendly solvents and readily available starting materials. (C) 2015 Elsevier Ltd. All rights reserved.