Iron fluoride: the most efficient catalyst for one-pot synthesis of 4H-pyrimido[2,1-b]benzothiazoles under solvent-free conditions
作者:Amol B. Atar、Yong Seok Jeong、Yeon Tae Jeong
DOI:10.1016/j.tet.2014.05.094
日期:2014.8
A new iron fluoride assisted convenient and efficient strategy for the preparation of 4H-pyrimido[2,1-b]benzothiazolesderivatives in solvent-free media is described. The reactions can be performed at low-catalyst loadings with excellent functional group tolerance. The catalyst can be readily recovered and reused for next reaction for at least three runs without any significant impact on the yields
描述了一种在无溶剂介质中制备4 H-嘧啶并[2,1- b ]苯并噻唑衍生物的新型氟化铁辅助方便高效策略。该反应可以在低催化剂负载下以优异的官能团耐受性进行。催化剂可以容易地回收并再用于至少三轮反应的下一步反应,而对产物的收率没有任何明显的影响。易于回收的催化剂和高收率的产品使该方案具有吸引力,可持续性和经济性。
Amberlyst-15® in PEG: A novel catalytic system for the facile and efficient one-pot synthesis of benzothiazolo-[2,3-b]-quinazolinone derivatives
作者:Kidwai Mazaahir、Chauhan Ritika、Bhatnagar Divya
DOI:10.1007/s11426-012-4665-z
日期:2012.10
A simple and convenient approach for the synthesis of tetraheterocyclic benzothiazolo-[2,3-b]-quinazolin-1-ones has been developed utilizing the MCR methodology, which involves the condensation of 2-aminobenzothiazole, cyclic β-diketones and various aldehydes using Amberlyst-15® in PEG 400 as an environmentally benign and reusable catalyst system. Environmental benignity, recyclability, cost-effectiveness
利用MCR方法开发了一种简单方便的合成四杂环苯并噻唑-[2,3 - b ]-喹唑啉-1-酮的方法,该方法涉及2-氨基苯并噻唑,环状β-二酮和各种醛的缩合反应。的Amberlyst-15 ®在PEG 400作为环境友好和可重复使用的催化剂体系。环境友好,可回收利用,成本效益,易于加工和优异的收率是这一一锅法的主要特点。
Study of DABCO Based Acidic Ionic Liquids Strategy for the Synthesis of 1,3-Dithiolane and Benzothiazolo-[2,3-b]-quinazolin-1-one Derivatives
作者:Priyanka Pinate、Abdulfatah Abdullah Abdu Saifan、Sangita Makone
DOI:10.1007/s10562-023-04411-1
日期:2024.4
explains the synthesis of 1,3-dithiolane and benzothiazolo-[2,3-b]-quinazolin-1-one derivatives employing DABCO-based ionic liquids as a facile, sustainable, and recyclablecatalyst. FT-IR, NMR, and mass spectrometry were used to characterize synthetic compounds. The current approach displays a number of advantages, including an affordable and environmentally friendly catalyst, green solvent media