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Polycondensations of hydroxycarboxylic acids derived from optically active aminoalcohols and acid anhydrides—syntheses of functional poly(ester-amide)s

✍ Scribed by Emiko Koyama; Fumio Sanda; Takeshi Endo

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
698 KB
Volume
35
Category
Article
ISSN
0887-624X

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✦ Synopsis

Syntheses and polycondensations of optically active hydroxycarboxylic acids prepared from acid anhydrides and aminoalcohols were carried out. Novel polymers with it?. 9900-27,200 were obtained by the polycondensations of hydroxycaboxylic acids derived from maleic or succinic acid using 1.2 eq. of 1-ethyl-3-(3 -dimethylaminopropyl) carbodiimide hydrochloride (EDC . HCI) in DMF (2M) at room temperature for 8 h in satisfactory yields. Meanwhile, a hydroxycarboxylic acid obtained from phthalic acid afforded no polymer but a phthalimide derivative. The radical additions of ethanethiol or mercaptoethanol with the polymers derived from maleic anhydride proceeded smoothly in satisfactory incorporation ratios (65-98% ), respectively. The polymer obtained from succinic anhydride and 2-aminoethanol showed hydrolytic degradability. t 1997 ,JohnWiley & Sons, Inc. Keywords: hydroxycaboxylic acids q optically active aminoalcohol q polycondensation q poly(ester-amide) q hydrolytic degradation * To whom all correspondenceshould be addressed.

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