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Synthesis and antimicrobial evaluation of some novel thiomorpholine derived 1,4-disubstituted 1,2,3-triazoles

Battula Kumaraswamy (Kakatiya University, Department of Chemistry, Warangal, India)
Narsimha Sirassu (Kakatiya University, Department of Chemistry, Warangal, India)
Nagavelli Vasudevareddy (Kakatiya University, Department of Chemistry, Warangal, India)
Bollepelli Priyanka (Indian Institute of Chemical Technology, Chemical Biology Laboratory, Hyderabad, India)
Srinivasa Rao Mutheneni (Indian Institute of Chemical Technology, Chemical Biology Laboratory, Hyderabad, India)

A convenient synthesis of novel1,4-disubstituted 1,2,3-triazoles (4a-j & 5a-j) is reported via copper (I) - catalyzed one pot [3+2] cycloaddition of various alkyl halides, sodium azide with (prop-2-yn-1-yl)thiomorpholine and 4-(prop-2-yn-1-yl)thiomorpholine 1,1-dioxide. All the synthesized compounds were investigated for their antimicrobial activity. Compounds 4a, 4b, 4c, 4g, 5a and 5j against S.epidermidis, 4a, 5a and 5d against P. aeroginosa, 4a, 4b and 4g against K.pneumoniae, 4b, 5a and 5d against S.aureus and 5b, 5e and 5j against B.Subtilis have shown excellent antibacterial activity compared to the standard drugs Penicillin and Streptomycin. Compounds 4c, 4e, 4f, 4j, 5c, 5d, 5g and 5j have registered moderate antifungal activity as compared with standard drug Ampothericin-B.

Keywords: one pot synthesis, CuAAC reaction, alkyl azides, antimicrobial activity