Organic compounds -- part of the class 532-570 series – Organic compounds – Thiocarboxylic acids or salts thereof
Reexamination Certificate
2005-05-11
2009-12-15
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Thiocarboxylic acids or salts thereof
C423S414000, C558S243000, C558S244000, C528S196000
Reexamination Certificate
active
07632966
ABSTRACT:
This invention provides an efficient method for synthesizing trithiocarbonate RAFT agents, RSC(S)SR′, that can be used in the living polymerization of methacrylates and other olefinic monomers. This invention also provides an efficient method of synthesizing bis(alkylsulfanylthiocarbonyl) disulfides that are useful as intermediates in the synthesis of trithiocarbonate RAFT agents.
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Gareau et al. Free Radical Reaction of Diisopropyl Xanthogen Disulfide with Unsaturated Systems, 1998, Heterocycles, vol. 48, No. 10, 2008, 2016.
Thang, et al. A Novel Systhesis of Functional Dithioesters, Dithiocarbamates, Xanthates and Trithiocarbonates, Tetrahedron Letters, 1999, vol. 40, No. 13, 2436, 2437.
Cutliff Yate′ K
E.I. du Pont de Nemours and Company
Kaeding Konrad S.
Nazario-Gonzalez Porfirio
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