A tandem decarboxylation and inverse electron-demand Diels–Alder reaction of amino-thiophenecarboxylic acids with 1,3,5-triazines
摘要:
The scope of 1,3,5-triazine inverse electron-demand Diels-Alder (IDA) reactions was expanded to include aminothiophenecarboxylic acids as latent dienophiles. A series of 2-amino-3-thiophenecarboxylic acids (1a-d) and a 3-amino-2-thiophenecarboxylic acid (5) were introduced as productive dienophiles in IDA reactions with various 1,3,5-triazines (2a-e). This method is useful for the one-step synthesis of both thieno[2,3-d]pyrimidines and thieno[3,2-d]pyrimidines, which should complement existing methods. (C) 2009 Elsevier Ltd. All rights reserved.
A tandem decarboxylation and inverse electron-demand Diels–Alder reaction of amino-thiophenecarboxylic acids with 1,3,5-triazines
作者:Qun Dang、Edmund Carruli、Feng Tian、Francis W. Dang、Tony Gibson、Wenyu Li、Huachen Bai、Michael Chung、Scott J. Hecker
DOI:10.1016/j.tetlet.2009.03.180
日期:2009.6
The scope of 1,3,5-triazine inverse electron-demand Diels-Alder (IDA) reactions was expanded to include aminothiophenecarboxylic acids as latent dienophiles. A series of 2-amino-3-thiophenecarboxylic acids (1a-d) and a 3-amino-2-thiophenecarboxylic acid (5) were introduced as productive dienophiles in IDA reactions with various 1,3,5-triazines (2a-e). This method is useful for the one-step synthesis of both thieno[2,3-d]pyrimidines and thieno[3,2-d]pyrimidines, which should complement existing methods. (C) 2009 Elsevier Ltd. All rights reserved.