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《武汉大学学报:自然科学英文版》
>Synthesis of Calix4 dithiacrown PlatinumComplexes and Their Catalytic Behavior in the Hydrosilylation of Olefins with Triethoxysilane
Synthesis of Calix4 dithiacrown PlatinumComplexes and Their Catalytic Behavior in the Hydrosilylation of Olefins with Triethoxysilane
5, 11, 17, 23-Tetrakis-1’, 1’-dimethylethyl-25, 27-dihydroxy-26, 28-1", 7", 13"-trioxa-4", 10-dithia-tridecylcene-calix [4] arene (calix [4]dithiacrown-5 ) and its O-methylated derivate (dimethylcalix [4]dithi-acrown-5 ) were synthesized from p-tert-butylcalix [4] arene vla 1, 3-lower rim functlonalization withchloroethyltosylate, followed by rlng-closlng condensation with β,βP’-dimercaptoethyl ether in the presence of sodium ethoxide as a base in reflux ethanol under nitrogen atmosphere, rollowed hy methylation with methyl-tosylate in the presence of NaH as a base in dioxane. It was round that they can coordinate with platinous chloride and the Platinous complexes are efficient catalysts ror the kydrosilylation of olefins with triethoxysi-lane.
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