Solvent-free multicomponent reactions using the novel N-sulfonic acid modified poly(styrene-maleic anhydride) as a solid acid catalyst
作者:Majid. M. Heravi、Elaheh Hashemi、Yahya Shirazi Beheshtiha、Khadijeh Kamjou、Maryam Toolabi、Nastaran Hosseintash
DOI:10.1016/j.molcata.2014.04.024
日期:2014.10
A novel one-pot three-component reaction: Synthesis of triheterocyclic 4H-pyrimido[2,1-b]benzazoles ring systems
作者:Ahmad Shaabani、Abbas Rahmati、Soheila Naderi
DOI:10.1016/j.bmcl.2005.08.101
日期:2005.12
A novel one-pot three-component condensation reaction of an aldehyde, beta-ketoester and 2-aminobenzimidazole or 2-aminobenzothiazole in 1,1,3,3-N,N,N',N'-tetramethylguanidinium trifluoroacetate as an ionic liquid is described. During the course of this reaction 4H-pyrimido[2,1-b]benzimidazoles or 4H-pyrimido[2,1-b]benzothiazoles are formed in high yields at 100 degrees C. The ionic liquid can be recovered conveniently and reused efficiently. (c) 2005 Elsevier Ltd. All rights reserved.
Convenient Approach for the One-Pot, Three-Component Synthesis of Triheterocyclic 4<i>H</i>-Pyrimido[2,1-<i>b</i>]benzothiazole Derivatives Using TBAHS
作者:Lingaiah Nagarapu、Hanmant K. Gaikwad、Jyothsna Devi Palem、Ramineni Venkatesh、Rajashaker Bantu、B. Sridhar
DOI:10.1080/00397911.2011.592624
日期:2013.1.1
An efficient and convenient synthesis of 4H-pyrimido[2,1-b]benzothiazole derivatives has been achieved by a one-pot, three-component condensation reaction of 2-amino-benzothiazole (1) with substituted benzaldehydes (2a-f) and beta-dicarbonyl derivatives (3a-e) in presence of 30 mol% of tetrabutylammonium hydrogen sulfate (TBAHS) in good to excellent yields.
Agar: a novel, efficient, and biodegradable catalyst for the one-pot three-component and green synthesis of 2,3-dihydroquinazolin-4(1H)-one, 4H-pyrimidobenzothiazole and 2-aminobenzothiazolomethylnaphthol derivatives
Abstract 3-(2′-Benzothiazolyl)-2,3-dihydroquinazolin-4(1 H )- one, 1-((benzo[d]thiazol-2-ylamino) (aryl)-methyl)naphthalen-2-ol and 4 H -pyrimido[2,1-b][1,3]benzothiazoles derivatives were prepared via one-pot three-component reaction of arylaldehydes, 2-aminobenzothiazole and isatoic anhydride or β -naphthol or ethyl/methyl acetoacetate in the presence of agar as a highly efficient homogenous catalyst
摘要 3-(2'-苯并噻唑基)-2,3-二氢喹唑啉-4(1 H )-一,1-((苯并[d]噻唑-2-基氨基)(芳基)-甲基)萘-2-醇和在芳烃存在下,通过芳醛,2-氨基苯并噻唑与异丁酸酐或 β- 萘酚或乙基/甲基乙酰乙酸的一锅三组分反应制得4 H- 嘧啶并[2,1-b] [1,3]苯并噻唑衍生物 琼脂作为高效均质催化剂。使用无毒且可生物降解的催化剂以及高收率,较短的反应时间,简单的后处理和绿色条件是该方法的最重要优点。图形概要