An Efficient and Improved Method for the Synthesis of Bis(arylmethylidene)thiopyranones
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi
DOI:10.1055/s-2005-872656
日期:——
aldehydes with tetrahydrothiopyran-4-one in the presence of N-(trimethylsilyl)diethylamine and 5 M lithium perchlorate in diethyl ether at room temperature is described. Excellent yields of 3,5-bis(arylmethylidene)thiopyranones are achieved in a facile one-pot general procedure.
描述了在室温下,在 N-(三甲基甲硅烷基)二乙胺和 5 M 高氯酸锂的二乙醚存在下,多种芳香醛与四氢噻喃-4-酮的双交叉羟醛缩合反应。3,5-双(芳基亚甲基)噻喃酮的高产率是通过简单的一锅通用程序实现的。
A highly efficient method for solvent-free synthesis of bisarylmethylidenes of pyranones and thiopyranones
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi、Roholah Sharifi
BF<sub>3</sub>·OEt<sub>2</sub>-Mediated Tandem Annulation: A Strategy To Construct Functionalized Chromeno- and Pyrano-Fused Pyridines
作者:K.T. Ashitha、V. Praveen Kumar、C.T. Fathimath Salfeena、B. S. Sasidhar
DOI:10.1021/acs.joc.7b02463
日期:2018.1.5
variety of N-substituted pyridine-fused chromeno and pyrano derivatives were obtained with satisfactory yields under mild reaction conditions. The method was proven to be valid for the synthesis of a diverse library of chromeno[3,4-c]pyridines, thiochromeno[3,4-c]pyridines, pyrano[3,4-c]pyridines, and thiopyrano[3,4-c]pyridinederivativesfrom readily accessible substrates. This experimentally simple
描述了一种在BF 3 ·OEt 2存在下简单有效的一环芳基酮,炔烃和腈的方法。在温和的反应条件下以令人满意的产率获得了高度官能化的各种N-取代的吡啶-稠合的色诺和吡喃衍生物。事实证明,该方法可用于合成各种色素铬并[3,4- c ]吡啶,硫代色素[3,4- c ]吡啶,吡喃并[3,4- c ]吡啶和硫代吡喃并[3,来自容易获得的底物的4- c ]吡啶衍生物。这个实验简单的方案在一锅操作中提供了结构复杂,生物学相关的杂环。
Synthesis of Bis(arylmethylidene)thiopyranones and Crystal Structure of the Phenyl Derivative
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi、A. Wahid Mesbah、Nafiseh Mohaddes Ghandchi、Werner Massa
DOI:10.1080/10426500701542759
日期:2007.10.18
A convenient method is offered for double aldol condensation of tetrahydrothiopyran-4-one with aromatic aldehydes under LiBr catalysis. An X-ray analysis verifies the proposed structures.