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The interaction of alkyl α-(S)-Malates with N,N′-dicyclohexylcarbodiimide under mild conditions

✍ Scribed by Nadya Belcheva; Ivan M. Panayotov; Christo Tsvetanov

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
281 KB
Volume
27
Category
Article
ISSN
0014-3057

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✦ Synopsis

The autopolycondensation of alkyl ct-(S)-malates in the presence of N,N'-dicyclohexylcarbodiimide under mild conditions was studied. It was established that the final product consists of low molecular N-acyl derivatives and optically active polyester fraction with 3~ n up to 4000 and low polydispersity Jl~w/AT . = 1.1 -1.5. When malic acid was used as a monomer surprisingly low molecular weight products of ester and anhydride nature were obtained instead of the expected polymalic network. All the polymer fractions separated were optically active oligoesters which could be used as biodegradable carriers of pharmaceutical agents.

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