First synthesis of poly(acylmethylene)s via palladium-mediated polymerization of diazoketones
First synthesis of poly(acylmethylene)s via palladium-mediated polymerization of diazoketones
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DOI：
10.1021/ma048293u
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发表时间：
2005-03-22
期刊：
影响因子：
5.5
通讯作者：
Inoue, K
中科院分区：
文献类型：
--
作者：
Ihara, E;Fujioka, M;Inoue, K
钯引发的重氮酮(1a、2a、3a、4a和6a)聚合得到了聚酰亚甲基S(1b、2b、3b、4b和6b)，其中所有主链碳都含有酰基。通过核磁共振光谱、元素分析和相对分子质量测定(GPC和VPO)对新型聚合物的结构进行了表征，元素分析结果表明主链中含有少量偶氮基(-N=N-)(约为1-N=N-)。聚合反应需要单体中与羰基碳相邻的C=C双键存在。以重氮酮和重氮乙酸乙酯8为共聚单体，在钯的作用下进行共聚反应，得到了不同取代亚甲基的S。
Palladium-mediated polymerization of diazoketones (1a, 2a, 3a, 4a, and 6a) proceeded to give poly(acylmethylene)s (1b, 2b, 3b, 4b, and 6b), in which all of the main chain carbons had acyl groups. The structures of the novel polymers were characterized by NMR spectroscopy, elemental analyses, and molecular weight measurements (GPC and VPO), where the results of the elemental analyses suggested incorporation of a small amount of azo group (-N=N-) into the main chain (ca. one -N=N- per polymer chain). The presence of a C=C double bond adjacent to the carbonyl carbon in the monomers was required for the polymerization to proceed. Palladium-mediated copolymerizations using a variety of combinations of diazoketones and ethyl diazoacetate, 8, as comonomers proceeded to give various poly(substituted methylene)s.