An economically and environmentally sustainable synthesis of 2-aminobenzothiazoles and 2-aminobenzoxazoles promoted by water
作者:Xinying Zhang、Xuefei Jia、Jianji Wang、Xuesen Fan
DOI:10.1039/c0gc00418a
日期:——
Tandemreactions of isothiocyanates (1) with 2-aminothiophenols (2), or isothiocyanates (1) with 2-aminophenols (4), were carried out rapidly and efficiently in water. A significant rate acceleration of the reaction between 1a and 2a in water compared with commonly used volatile organic solvents was observed. Through these reactions, a variety of structurally and pharmaceutically interesting 2-aminobenzothiazoles
A Cu<sub>2</sub>O/TBAB-promoted approach to synthesize heteroaromatic 2-amines <i>via</i> one-pot cyclization of aryl isothiocyanates with <i>ortho</i>-substituted amines in water
An efficient approach to synthesize heteroaromatic 2-amines from one-pot desulfurization/dehydrogenative cyclization of aryl isothiocyanates with ortho-substituted amines in water was developed. This approach tolerated a wide range of functional groups on the aromatic ring, providing a practical and environment-friendly process to synthesize heteroaromatic 2-amines in moderate to excellent yields.
开发了一种在水中用邻位取代胺一锅法脱硫/脱氢环化芳基异硫氰酸酯合成杂芳族 2-胺的有效方法。这种方法在芳环上具有多种官能团,提供了一种实用且环境友好的方法,可以以中等至优异的产率合成杂芳族 2-胺。提出了一种似是而非的机制,并借助 ESI 质谱法提出了 TBAB 和 Cu 2 O 在本策略中的作用。