| 摘要 |
This invention is a process for preparation of 2,4-heteroatom-substituted molybdena-3,3-dioxocycloalkane compounds by reacting diol-, diamino, thiol-alcohol- and amino-alcohol-compounds with the following reagents: ammonium molybdate (or in situ produced ammonium molybdate by the reaction of ammonia with molybdenum trioxide or molybdic acid) as a molybdenum source, ammonia as an additional or secondary reagent or promoter, in molar ratio NH<SUB>3</SUB>:Mo (amount of molybdenum in the molybdenum source) of >=1:1, preferably 1-3:1, more preferably 2-3:1, and most preferred 2.2-2.65:1.
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