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A mercapto group generated by addition of 5-phenoxymethyl-1,3-oxathiolane-2-thione and benzylamine could react with cyclic acid anhydrides to give the corresponding carboxylic acids. This method was applied to a polymer modification. Poly(thiourethane)s containing mercapto groups were prepared from difunctional five-membered cyclic dithiocarbonates and diamines could react with succinic or glutaric...
A novel polyaddition of terminal acetylenes bearing electron-withdrawing groups with dithiols, via a phosphine-catalysed double conjugate addition, is described. From the model reaction of methyl propiolate (1) with benzylmercaptan in the presence of tri-n-butylphosphine catalyst, the corresponding dithioacetal was obtained in high yield when the reaction was carried out under higher concentrations...
Phosphine-catalysed polyaddition of bifunctional ynones with diols or with dithiols is described. By the tri-n-butylphosphine-catalysed polyaddition of aromatic bis(ynone) having benzene ring as a spacer (without methylene group adjacent to carbonyl groups) or aliphatic bis(ynone) having octamethylene group as a spacer with p-xylene glycol, polymers having β-alkoxyenone moieties in the main chain...
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