Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Reexamination Certificate
2007-10-30
2007-10-30
Nazario-Gonzalez, Porfirio (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
C556S136000
Reexamination Certificate
active
11472137
ABSTRACT:
Ruthenium and osmium carbene compounds that are stable in the presence of a variety of functional groups and can be used to catalyze olefin metathesis reactions on unstrained cyclic and acyclic olefins are disclosed. Also disclosed are methods of making the carbene compounds. The carbene compounds are of the formulawhere M is Os or Ru; R<1> is hydrogen; R is selected from the group consisting of hydrogen, substituted or unsubstituted alkyl, and substituted or unsubstituted aryl; X and X<1> are independently selected from any anionic ligand; and L and L<1> are independently selected from any neutral electron donor. The ruthenium and osmium carbene compounds of the present invention may be synthesized using diazo compounds, by neutral electron donor ligand exchange, by cross metathesis, using acetylene, using cumulated olefins, and in a one-pot method using diazo compounds and neutral electron donors. The ruthenium and osmium carbene compounds of the present invention may be used to catalyze olefin metathesis reactions including, but not limited to, ROMP, RCM, depolymerization of unsaturated polymers, synthesis of telechelic polymers, and olefin synthesis.
REFERENCES:
patent: 6211391 (2001-04-01), Grubbs et al.
Wakatsuki et al., Journal of American Chemical Society, vol. 113, No. 25, pp. 9604-9610 (1991).
Grubbs Robert H.
Nguyen Sonbinh T.
Schwab Peter
California Institute of Technology
Lindeman Jeffrey A.
Nazario-Gonzalez Porfirio
Nixon & Peabody LLP
Townes Jeffrey N.
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