Benzo[b]thiophene derivatives I. 6‐methoxybenzo[b]thiophene analogs of plant growth regulators

Abstract

The acid catalyzed ring closure of an appropriately substituted phenyl ketoester sulfide served as the initial reaction in the synthesis of several 3,4-and 3,6-disubstituted benzo[ b Ithiophenes One of these compounds, 4-methoxybenzo[b Ithienyl-3-acetic acid, showed marked plant growth enhancement.