Polymerization of Various Alkyl Diazoacetates Initiated with (N-Heterocyclic Carbene)Pd/Borate Systems
Polymerization of Various Alkyl Diazoacetates Initiated with (N-Heterocyclic Carbene)Pd/Borate Systems
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DOI：
10.1021/ma200064b
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发表时间：
2011-05-10
期刊：
影响因子：
5.5
通讯作者：
Inoue, Kenzo
中科院分区：
文献类型：
--
作者：
Ihara, Eiji;Takahashi, Hiroki;Inoue, Kenzo
采用（NHC）Pd/硼酸盐引发体系（NHC = N-杂环卡宾）引发含多种酯基的重氮乙酸烷基酯聚合。以正己基、环己基、苄基和胆甾醇基为酯基的单体分别转化为M-n > 10000的聚烷氧羰基亚甲基。另一方面，1-金刚烷基重氮乙酸酯的聚合得到低M-n聚合物（M-n < 4000），可能是由于空间原因。一些共聚单体组合的共聚也成功地进行，得到M-n > 20 000的共聚物。
(NHC)Pd/borate initiating systems (NHC = N-heterocyclic carbene) were applied for polymerization of alkyl diazoacetates with a variety of ester groups. The monomers with n-hexyl, cyclohexyl, benzyl, and cholesteryl group as an ester group were transformed into the corresponding poly(alkoxycarbonylmethylene)s with M-n > 10 000. On the other hand, the polymerization of 1-adamantyl diazoacetate afforded low-M-n polymers (M-n < 4000), probably because of steric reasons. Copolymerization of a few comonomer combinations also proceeded successfully to give copolymers with M-n > 20 000.