FeCl3-promoted synthesis of 1,3,4-thiadiazoles under combined microwave and ultrasound irradiation in water
作者:Huangdi Feng、Xili Ying、Yanqing Peng、Erik V. Van der Eycken、Chuanduo Liu、Shanshan Zhao、Gonghua Song
DOI:10.1007/s00706-012-0846-x
日期:2013.5
AbstractAn eco-friendly and efficient synthesis of substituted 1,3,4-thiadiazole derivatives has been developed. This aqueous heterogeneous approach proceeds smoothly and quickly under combined microwave and ultrasound irradiation in the presence of FeCl3. Graphical Abstract
and facile visible-light mediated protocol for the synthesis of 2-arylamino-5-aryl-1,3,4- thiadiazoles via one-potcondensation and intramolecular C–S coupling cascade reaction has been developed. This protocol is mild, practical, metal-free and exogenous oxidant-free, and only involves Eosin Y as photocatalyst using oxygen as the sole terminal oxidant. This protocol exhibits synthetic simplicity, broad
摘要 开发了一种通用且简便的可见光介导方案,用于通过一锅缩合和分子内 C-S 偶联级联反应合成 2-arylamino-5-aryl-1,3,4- 噻二唑。该协议温和、实用、不含金属和外源氧化剂,仅涉及曙红 Y 作为光催化剂,使用氧气作为唯一的终端氧化剂。该协议展示了合成的简单性、广泛的底物范围和出色的功能组兼容性。还可以以令人满意的产率促进克级合成,这开辟了实际应用的可能性。
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