A direct and high yielding route to 2-(5-tetrazolyl) substituted benzopyran-4-ones: synthesis of pranlukast

GR Geen, RG Giles, TJ Grinter, JD Hayler…

Index: Synthetic Communications, , vol. 27, # 6 p. 1065 - 1073

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Citation Number: 5

Abstract

Page 1. SYNTHETIC COMMUNICATIONS, 27(6), 1065-1073 (1997) ... The synthetic methodology used to prepare substituted benzopyran-4-ones has been ... prepare the following compounds: 8-Benzamido-2-(5-tetrazolyl)benzopyran-4-one 1 b (89%), m.pt. 270-27 1'C ...