Abstract
5,11,17,23-Tetrakis-1′, 1′-dimethylethyl-25,27-dihydroxy-26,28-1″, 7″, 13″-trioxa-4″, 10″-dithiatridecylcene-calix[4]arene (calix[4]dithiacrown-5) and its O-methylated derivate (dimethylcalix[4]dithiacrown-5) were synthesized fromp-tert-butylcalix[4] arene via 1, 3-lower rim functionalization with chloroethyltosylate, followed by ring-closing condensation with β,β/t'-dimercaptoethyl ether in the presence of sodium ethoxide as a base in reflux ethanol under nitrogen atmosphere, followed by methylation with methyltosylate in the presence of NaH as a base in dioxane. It was found that they can coordinate with platinous chloride and the platinous complexes are efficient catalysts for the hydrosilylation of olefins with triethoxysilane.
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Foundation item: Supported by National Natural Science Foundation of China
Biography: CHEN Yuan-yin (1936-), male, Professor.
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Yuan-yin, C., Yi-sui, Z., Zhen-lin, Z. et al. Synthesis of calix[4]dithiacrown platinum complexes and their catalytic behavior in the hydrosilylation of olefins with triethoxysilane. Wuhan Univ. J. Nat. Sci. 4, 350–354 (1999). https://doi.org/10.1007/BF02842371
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DOI: https://doi.org/10.1007/BF02842371