1 by dialkyl carbonate heterocyclization to afford I (A= H, B= OH), whose arene ring was further elaborated by using electrophilic aromatic substitution methodology;(2) cycloaddition of substituted aryl isocyanates with epoxides to give A and B with a variety of values. I with B= OH or Br were converted to other" B" functionalities by using SN~ methodology. Antibacterial evaluation of compounds I with A= acetyl, isopropyl, methylthio, ...