3009-79-8Relevant articles and documents
Microwave induced novel synthetic route to organomercurials
Kidwai, Mazaahir,Goel, Yogesh
, p. 2819 - 2824 (2008/10/09)
Organomercurials of 2-mercapto-5-methyl-1,3,4-thiadiazole and 2-mercapto-5-[4′-methyl quinolinyl-2-oxy methyl]-1,3,4-oxadiazole with aryl mercuric chloride have been synthesized under microwave irradiation in open vessels in a domestic microwave oven within a few minutes. This reaction rate was ca 100 times faster than the reaction rate in the conventional way. These Organomercurials have a 1:1 stoichiometric ratio of aryl mercury and thiadiazole or oxadiazole moiety. Copyright
Selectivity and reactivity in reactions of methylaryltitanium(IV) complexes with electrophiles
Puddephatt, Richard J.,Stalteri, Maria A.
, p. 1400 - 1405 (2008/10/08)
Methyl or phenyl for halogen-exchange reactions occur between [TiMe2(η-C5H5)2] or [TiPh2(η-C5H5)2] with [TiX2(η-C5H5)2], X = halogen, to give [TiXMe(η-C5H5)2] or [TiXPh(η-C5H5)2], respectively. The reactions are complicated by parallel decomposition of the methyl- or phenyltitanium complexes, which is catalyzed by [TiX2(η-C5H5)2] or [TiXR(η-C5H5)2]. In general, there is little difference in the rates of reaction of [TiMe2(η-C5H5)2] and [TiPh2(η-C5H5)2] toward the symmetrization reactions. These reagents also transfer a methyl group or phenyl group to platinum(II) or gold(III), but there are again side reactions. The complex [TiMePh(η-C5H5)2] reacts with electrophiles HCl, HOAc, HgCl2, and MeHgCl to give cleavage of both methyl- and phenyltitanium bonds with little selectivity. In cleavage of [TiMe(C6H4X)(η-C5H5) 2] there is a correlation of the selectivity for cleavage of the aryl group by electrophiles HCl or HgCl2 with the σ+ parameters of substituents X. A mechanism of reaction involving electron transfer from the complex to the electrophile followed by rapid cleavage is tentatively suggested.
