The Journal of Organic Chemistry

Intramolecular Diels-Alder reactions of 1, 2, 4-triazines. A facile synthesis of thieno [2, 3-b] pyridines and 3, 4-dihydro-2H-thiopyrano [2, 3-b] pyridines

EC Taylor, JE Macor

Index: Taylor, Edward C.; Macor, John E. Journal of Organic Chemistry, 1987 ,  vol. 52,  # 19  p. 4280 - 4287

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Citation Number: 37

Abstract

Thieno [2, 3-b] pyridines and 3, 4-dihydro-2H-thiopyrano [2, 3-b] pyridines have been prepared in high overall yields via intramolecular Diels-Alder reactions of properly substituted 1, 2, 4-triazine derivatives. A one-pot synthesis of 2, 3-dihydrothieno [2, 3-b] pyridines from thiosemicarbazide is described.