Process for the preparation of thioxanthones

Details Process for the preparation of thioxanthones Process for the preparation of thioxanthones

2006-10-24

2006-10-24

Lambkin, Deborah C. (Department: 1626)

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07126011

ABSTRACT:
Processes are described for the preparation of thioxanthones (Formula I). A reactant mixture of a 2-chlorothiobenzoyl chloride (Formula II) and an aromatic compound (Formula III) is added to a slurry of a Friedel-Crafts catalyst in an organic Friedel-Crafts solvent. Products of the processes may be used for the preparation of a pharmaceutical product for use in the field of psycho-therapeutics, or as activators or sensitizers in the photo-polymerization of ethylenically unsaturated monomers

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Bernard Belleau et al., Synthetic Communications, (1983), 13(12), 977-984; “O-Chlorosulfenylbenzoyl Chloride: A Useful Reagent in the Synthesis of Thioxanthones”.
Smiles, J. Chem. Soc. (1911), 99, 640-649; “LXXII.-The Interaction of Aromatic Disulphides and Sulphuric Acid”.
Copy of the International Search Report dated Aug. 20, 2001.

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