Synlett 2022; 33(08): 754-758
DOI: 10.1055/a-1790-2992
letter

Acid-Mediated Synthesis of Chromeno[2,3-b]pyridine Derivatives via Condensation of 2-Amino-3-formylchromones and 1-(Methylthio)-2-nitroenamine Derivatives

Authors

  • Hongchen Yang

  • Lu Zhang

  • Xiaoyong Xu

  • Xusheng Shao

  • Zhong Li


This work was supported by the Innovation Program of Shanghai Municipal Education Commission (201701070002E00037), and the National Key Research and Development Program of China (2017YFD0200505).


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Abstract

A convenient and effective protocol has been proposed for the synthesis of chromeno[2,3-b]pyridine derivatives via the CF3SO3H-catalyzed annulation of substituted 2-amino-3-formylchromones and various 1-(methylthio)-2-nitroenamine derivatives. This method is time-efficient, convenient, high-yielding, and exhibits a good functional group compatibility.

Supporting Information



Publication History

Received: 21 January 2022

Accepted after revision: 07 March 2022

Accepted Manuscript online:
07 March 2022

Article published online:
25 April 2022

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