Patent ID: 7205423

Claim:
A process for preparing 2,4-heteroatom-substituted molybdena-3,3-dioxocycloalkane compounds, comprising the steps of: reacting (A) a starting material having the structural formula wherein X 1 and X 2 are selected from the group consisting of O, S or N and where n or m=1 when X 1 or X 2 is O or S and n or m=2 when X 1 or X 2 is N, y=0 or 1, and wherein R 1 , R 2 , R 3 , R 4 and R 5 are independently selected from the group consisting of hydrogen, alkyl, alkenyl, aryl, alkylaryl hydrocarbon group or fatty residue containing from 1 to 50 carbon atoms or polymeric residues having a molecular weight of 150 to 1200; and selected from poly-alpha-olefin, polypropene, polybutylene and polyisobutylene; with: (B) ammonium molybdate as a molybdenum source sufficient to yield about 2 to 20 percent of molybdenum based on the weight of the molybdena-compound, in the presence of water, and (C) an additional or secondary reagent or promoter in molar amount≧1:1, Z:Mo, where Z is one of or both in combination of (i) ammonia and (ii) an alkylamine where the alkyl groups are independently selected from straight or branched chain C1 to C6; removing water; and recovering the molybdena-compounds.