Regioselective Synthesis of 5H-Thiazolo[3,2-a]pyrimidin-5-ones from Morita-Baylis-Hillman Adduct Acetates under Solvent-Free and Base-Free Conditions
作者:Weike Su、Weihui Zhong、Baoming Guo、Fuliang Lin、Yongliang Liu
DOI:10.1055/s-0028-1088051
日期:2009.5
with high regioselectivity by nucleophilic addition of thiazol-2-amines to Morita-Baylis-Hillmanadduct acetates, followed by cyclization and a thermo-sigmatropic shift procedure under solvent-free and base-free conditions. fused-ring systems - heterocycles - α,β-unsaturated esters - thiazol-2-amines - solvent-free - base-free
通过将噻唑-2-胺亲核加到森田-贝利斯-希尔曼加合物乙酸酯中,然后环化和制备5 H-噻唑并[3,2- a ]嘧啶-5-酮,可以以良好至优异的收率和高区域选择性轻松制备。在无溶剂和无碱条件下进行热-色移程序。 稠环系统-杂环-α,β-不饱和酯-噻唑-2-胺-无溶剂-无碱
Fast, Microwave-Promoted One-Pot Synthesis of Bicyclic Pyrimidones from Baylis-Hillman Adducts
作者:Yongliang Liu、Kun Wan、Zengxue Wang
DOI:10.3184/174751915x14199645231447
日期:2015.2
Two types of fused pyrimidones, 3-substituted-7-chloro-4H -pyrimido[1,2-b]pyridazin-4-ones and 6-substituted-5H-thiazolo-[3,2-a]pyrimidin-5-ones were easily prepared from Baylis-Hillman adduct acetates under microwave irritation in high yields.
Dramatically Accelerated Addition Under Solvent-Free Conditions: An Efficient Synthesis of (<i>E</i>)-1,2,4-Triazole-Substituted Alkenes from Baylis–Hillman Acetates
作者:Weihui Zhong、Yongzhi Zhao、Baoming Guo、Peng Wu、Weike Su
DOI:10.1080/00397910802136623
日期:2008.9.12
Abstract The addition of 1,2,4-triazole to Baylis–Hillman acetates mediated by Et3N was dramatically accelerated under solvent-free conditions to afford (E)-1,2,4-triazole-substituted alkenes 3 with excellent yields.
An efficient synthesis of 3-arylmethyl-7,8-dihydro-6H-chromene-2,5-diones from Baylis–Hillman adduct acetates under solvent-free conditions
作者:Weihui Zhong、Yongzhi Zhao、Weike Su
DOI:10.1016/j.tet.2008.04.003
日期:2008.6
A simple, efficient synthesis of 3-arylmethyl-7,8-dihydro-6H-chromene-2,5-dione 4 from Baylis-Hillman adduct acetates derived from aromatic aldehydes and cyclohexane-1,3-diones under solvent-free conditions is described. Interestingly, when Baylis-Hillman adducts derived from aliphatic aldehydes were tested under the similar conditions, the unexpected stereoisomers 5 and 6 were obtained in moderate yields. A plausible mechanism for the formation of 4-6 is proposed. (C) 2008 Elsevier Ltd. All rights reserved.