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A series of nine methyl sulphones (  3a  –3  i  ) starting from the aldehydes (  1a–1i  ) were synthesized in two consecutive steps. In the first step, preparation of allyl alcohols (  2a–2i  ) from their corresponding aldehydes by the reaction of sodium borohydride in methanol at room temperature is reported. Finally, methyl sulphones are synthesized by condensing sodium methyl sulfinates with allyl alcohols in the presence of BF  3  .Et  2  O in acetic acid medium at room temperature for about 2–3 h. The reaction conditions are simple, yields are high (85%–95%), and the products were obtained with good purity. All the synthesized compounds were characterized by their  1  H,  13  C NMR, and mass spectral analysis. All the title compounds were screened for antimicrobial activity. Among the compounds tested, the compound  3f  has inhibited both Gram positive and Gram negative bacteria effectively and compound  3i  has shown potent antifungal activity. These promising components may help to develop more potent drugs in the near future for the treatment of bacterial and fungal infections.

An efficient approach for the synthesis of novel methyl sulfones in acetic acid medium and evaluation of antimicrobial activity