Preparation and Characterization of Pseudopoly(trans-4-hydroxy-L-proline ester).
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概要
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The preparation and characterization of polymers derived from hydroxyproline were investigated. Two new polymers of poly(<I>trans</I>-4-hydroxy-<I>N</I>-benzyloxycarbonyl-L-proline) [poly(<I>N</I>-<I>Z</I>-Hpr-OH)] and poly(<I>trans</I>-4-hydroxy-<I>N</I>-benzyloxycarbonyl-L-proline ester) [poly(<I>N</I>-<I>Z</I>-Hpr-OMe)], with easily removable pendant <I>N</I>-benzyloxycarbonyl group, were prepared. Weight-average molecular weight (<I>M<SUB>w</SUB></I>) of about 254000 and 33000 were obtained <I>via</I> esterification or transesterification, using stannous octoate as a catalyst, at 140°C under vacuum (20 mmHg) for 16 h. Removal of the <I>N</I>-benzyloxycarbonyl group by catalytic transfer hydrogenation yielded pseudopoly(<I>trans</I>-4-hydroxy-L-proline ester) [poly(Hpr-OMe·HCl)].
- 社団法人 高分子学会の論文
社団法人 高分子学会 | 論文
- Preparation and Characterization of Pseudopoly(trans-4-hydroxy-L-proline ester).
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