Rearrangement of the main chain of an organocobalt polymer. Synthesis of novel 2-pyridone-containing polymers by the reaction with isocyanates
Rearrangement of the main chain of an organocobalt polymer. Synthesis of novel 2-pyridone-containing polymers by the reaction with isocyanates
复制标题
有机钴聚合物主链的重排。
DOI：
10.1021/ma00113a005
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发表时间：
1995
期刊：
影响因子：
5.5
通讯作者：
T. Endo
中科院分区：
文献类型：
--
作者：
I. Tomita;Akinori Nishio;T. Endo
通过主链上含钴环戊二烯结构的有机金属聚合物（1）与各种异氰酸酯（2）反应，合成了主链上含吡啶酮结构和芳香体系的新型聚合物。当在密封管中在四氢呋喃中在120 ° C下加热1和5当量的深棕色异氰酸正丁酯（2a）6小时时，通过用甲醇沉淀以99%产率获得绿色聚合物（3a）。从光谱测量，发现所得聚合物含有N-正丁基-2-吡啶酮和（η 4 -环丁二烯）钴部分（分别为68%和32%）。通过改变2a/1的进料比，可以控制2-吡啶酮和环丁二烯钴部分的组成。使用各种异氰酸酯（2a-2d），获得具有各种取代基的含2-吡啶酮的聚合物。通过使用二异氰酸酯（2f），交联反应也是可能的。
Novel polymers having pyridone moieties as cvell as aromatic systems in the main chain were synthesized by the reaction of an organometallic polymer having cobaltacyclopentadiene moieties in the main chain (1) with various isocyanates (2). When dark brown 1 and 5 equiv of n-butyl isocyanate (2a) were heated in tetrahydrofuran at 120 o C for 6 h in a sealed tube, a greenish polymer (3a) was obtained in 99% yield by precipitation with methanol. From the spectroscopic measurements, the resulting polymer was found to contain N-n-butyl-2-pyridone and (η 4 -cyclobutadiene)cobalt moieties (68% and 32%, respectively). By changing the feed ratio of 2a/1, the composition of 2-pyridone and cyclobutadienecobalt moieties could be controlled. Using various isocyanates (2a-2d), 2-pyridone-containing polymers with various substituents were obtained. The cross-linking reaction could be also possible by using diisocyanate (2f)