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Various aliphatic and aromatic thiols are converted to the corresponding disulphides by catalytic reaction of 4-[bis-(4-hydroxyphenyl)methylene]-cyclohexa-2,5-dienone in good yield.
Authors thank the Council of Scientific and Industrial Research, New Delhi, India, for financial assistance.
a All the reactions were performed at room temperature for 1 h.
b For entries 8–10 N,N-dimethylformamide was used as the solvent.
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