Bis dihydropyrimidine: synthesis and antimycobacterial activity
Mohamed Ashraf Ali1, Elumalai Manogaran, Jeyabalan Govindasamy
1New Drug Discovery Research, Department of Medicinal Chemistry, Alwar Pharmacy College, Alwar, Rajasthan, India. asraf80med@rediffmail.com
Abstract:
A series of bis dihydropyrimidine compounds were synthesised by reacting dapsone with acetylacetoacetate to produce N1-4-[4-(2-oxopropylcarboxamido) phenylsulphonyl] phenyl-3-oxobutanamide, then treated with guanidine hydrochloride and an appropriate aldehyde with a catalytic amount of p-toluene sulphonic acid (PTSA) in the presence of methanol to afford the title compounds. The synthesised compounds were evaluated for their antimycobacterial activity against Mycobacterium tuberculosis H(37)Rv and isoniazid (INH) resistant M. tuberculosis. Among the synthesised compounds, compound N5-(4-4-[6-(4-fluorophenyl)-2-imino-4-methyl-1,2,3,4-tetrahydro-5-pyrimidinylcarboxamido]phenylsulphonylphenyl)-6-(4-fluorophenyl)-2-imino-4-methyl-1,2,3,4-tetrahydro-5-pyrimidine carboxamide (3g) was found to be the most promising compound with activity against M. tuberculosis H(37)Rv and INH resistant M. tuberculosis with a minimum inhibitory concentration (MIC) between 0.08 and 0.10 μM.
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