BioTechnology: An Indian Journal
ISSN (PRINT): 0974-7435

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Original Article

, Volume: 8( 7)

Synthesis of pranlukast

Abstract

4-(4-Phenylbutoxy)benzoic acid (2), which was prepared from tetrahydrofuran (4) by ring-opening, Friedel-Crafts alkylation, bromination and etherification, reacted with 3-amino-2-hydroxyacetophenone (3) to give 3-[4-(4-phenylbutoxy)benzoic amide]-2- hydroxyacetophenone (11), followed by reacting in the presence of 1H-tetrazol-5-ethyl formate (12) and cyclization to give pranlukast (1)with the overall yield of 24.7%(based on 4).

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BioTechnology: An Indian Journal

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