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A new 5-chloro-2-methylbenzenesulphonylacetic acid has been prepared from 4-chlorotoluene. The condensation of this acid and 4-bromo, 4-methoxy, 3,4-dichloro and 4-chloro-3-methylbenzenesulphonyl-acetic acids with different araldehydes gave some new unsaturated sulphones. The trans-structure for these compounds has been arrived at on the basis of infrared and proton magnetic resonance spectral data.
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Reddy et al. (1983) studied this question.
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