Synthesis of 1, 5- and 1, 7-dichloro-9H-thioxanthen-9-ones |
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| Authors: | Ichizo Okabayashi Noriko Murakami Kaoru Sekiya |
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| Affiliation: | Ichizo Okabayashi,Noriko Murakami (Née Iwata),Kaoru Sekiya |
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| Abstract: | 1, 5-Dichloro-9H-thioxanthen-9-one ( 2 ) was prepared by cyclization of 2-chloro-6-[(2-chlorophenyl)thio]-benzoic acid ( 10 ) obtained from 2-chloro-6-iodobenzoic acid ( 9 ) and 2-chlorobenzenethiol. Similarly, 1, 7-di-chloro-9H-thioxanthen-9-one ( 6 ) was prepared from 9 via 2-chloro-6-[(4-chlorophenyl)thio]benzoic acid ( 11 ). Compound 6 was also obtained by condensation of 2-chloro-6-mercaptobenzoic acid ( 12 ) with chlorobenzene in the presence of sulfuric acid. |
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