2-Butyl-7-methylene-1,4,6-trioxaspiro(4,4)nonane (7) was prepared by the reaction of 2-(bromomethyl)-5-oxo-tetrahydrofuran with 1,2-epoxyhexane, followed by dehydrobromination. Compound 7 could be polymerized by free radical initiators to give a viscous polymer. The IR and NMR spectra of the polymers indicated that the polymer structure contained ester and ketone units in the backbone, and a cyclic acetal side chain. Compound 7 readily copolymerized with acrylonitrile in the presence and absence of radical initiators, but did not copolymerize well with styrene. Ultraviolet spectra suggest that the spontaneous polymerization proceeds via a chargetransfer complex between 7 as an electron donor and AN as an electron acceptor.

中文翻译：

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2-丁基-7-亚甲基-1,4,6-三氧杂螺（4,4）壬烷的合成与聚合

通过使2-（溴甲基）-5-氧代-四氢呋喃与1,2-环氧己烷反应，然后再通过反应制得2-丁基-7-亚甲基-1,4,6-三氧杂螺（4,4）壬烷（7）。脱氢溴化。化合物7可以通过自由基引发剂聚合而得到粘性聚合物。聚合物的IR和NMR光谱表明，该聚合物结构在主链中含有酯和酮单元，以及环状缩醛侧链。在存在和不存在自由基引发剂的情况下，化合物7容易与丙烯腈共聚，但是与苯乙烯的共聚性不好。紫外线光谱表明，自发聚合反应是通过7作为电子给体和AN作为电子受体之间的电荷转移络合物进行的。