Rapid Access of Some Chloro‐substituted Isocoumarins and Biological Activity Toward Some Pathogenic Systems

Abstract

Sulphuric acid–catalyzed chloralhydrate condensation with different m‐substituted benzoic acids formed trichlorophthalides 1, from which Zn+AcOH reduction afforded various dichloro derivatives 2. These derivatives 2 on treatment with alkaline Hg(OAc)₂+I₂ furnished different substituted isocoumarins 4.

Keywords:

• 2‐(2,2′‐dichloroethenyl)‐5‐substituted benzoic acid
• 3‐chloro substituted isocoumarins

Acknowledgment

The authors are grateful to the Department of Chemistry, University of Rajshahi, Bangladash, for required chemicals and instruments, and to M. Motiur Rahman, a research fellow at Yonsei University in Korea, for necessary spectra.