Manufacture of thiolactones

Details Manufacture of thiolactones Manufacture of thiolactones

2011-05-03

2011-05-03

Solola, Taofiq A (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

active

07935829

ABSTRACT:
The present invention relates to a process for the manufacture of cyclic thio esters (thiolactones) and related compounds by hydrogenation of cyclic thioanhydrides in the presence of metal catalysts.

REFERENCES:
patent: 7803952 (2010-09-01), Bonrath et al.
Polec et al, “Temperature Dependence of the Reduction of Phthalic Thioanhydrides by NaBH4: Competition between 3-Hydroxythiolactone and Phthalide Formation”, European Journal of Organic Chemistry, (6),2002, pp. 1033-1036.
Chen et al, “An Efficient and Enantioselective Synthesis ofd-Biotin”, Synthesis, No. 14, 2000, pp. 2004-2008.
International Search Report mailed Aug. 3, 2006 in PCT/EP2006/003375.
Written Opinion mailed Aug. 3, 2006 in PCT/EP2006/003375.

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