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Condensation reaction of bis(aroylmethyl) sulfides with aromatic aldehydes and ammonium acetate has been studied. The product obtained in each case is identified as 2,6-diaroyl-3,5-diaryltetrahydro-1,4thiazines by their analytical and spectral data. The stereochemistry of the products is also discussed. It is interesting to note that in most cases the only isomer isolable has the benzoyl group axially oriented.
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