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Optically active poly(hydroxyurethane)s derived from cyclic carbonate and L-lysine derivatives

✍ Scribed by Nobuhiro Kihara; Yuuji Kushida; Takeshi Endo

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
482 KB
Volume
34
Category
Article
ISSN
0887-624X

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✦ Synopsis

The polyaddition of L-lysine hydrochloride and bifunctional five-membered cyclic carbonate 1 was carried out in DMAc in the presence of 1 equiv of DBU or 2 equiv of sodium hydride for 24 h to afford optically active polyurethane 2 bearing hydroxy and carboxyl group. The polyaddition of L-lysinol and 1 was also carried out in NMP to afford higher molecular weight of optically active polyurethane 3 bearing hydroxy group in quantitative yield. These polyurethanes reacted with cupric acetate, sodium tetrahydroborate, and titanium tetraisopropoxide to afford the corresponding crosslinked gels immediately.

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