Synthesis and Antibacterial Activity of Some New Phenothiazine Derivatives
A series of some new phenothiazine derivatives were synthesized with the objective for evaluation as antimicrobials. The title compounds were prepared by a five step synthesis scheme. 2-Amino-6-substituted benzothiazoles (1) on diazotization afford 6-substituted benzothiazolyl-2-diazonium chlorides...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Hindawi Limited
2007-01-01
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| Series: | E-Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2007/402673 |
| Summary: | A series of some new phenothiazine derivatives were synthesized with the objective for evaluation as antimicrobials. The title compounds were prepared by a five step synthesis scheme. 2-Amino-6-substituted benzothiazoles (1) on diazotization afford 6-substituted benzothiazolyl-2-diazonium chlorides (2). Reaction of 2 with cold solution of β-naphthol in dilute NaOH furnishes α-(2-diazo-6-substituted benzothiazolyl)- β-sodionaphthoxides (3) which on acidification with concentrated HCl gives α-(2-diazo-6-substituted benzothiazolyl)-β-naphthols (4). Reaction of 4 with p-substituted anilines gives α-(2-diazo-6-substituted benzothiazolyl)-β-(p-substituted anilino) naphthalenes (5). This synthesis besides by using conventional methods was also attempted using microwave. Fusion of 5 with sulphur in presence of iodine results in α-(2-diazo-6-substituted benzothiazolyl)-6- substituted [2, 3-b] benzophenothiazines(6). The structures of all these compounds have been supported by elemental analysis and their spectral studies. All synthesized compounds were tested for their antibacterial activity using standard drugs. |
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| ISSN: | 0973-4945 2090-9810 |