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Thiol-ene Michael Addition Reaction Under Phototriggered Base Proliferation

机译：光引发碱扩散下的硫酚-迈克尔加成反应

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摘要

Free radical reaction of thiol-ene photo click reaction is not ideal click chemistry type, there is monomer homopolymerization and low monomer conversion existing, as well as uncontrollable, it is difficult to obtain the target product. In this paper, the phototriggered base proliferation and UV photopolymerization were introduced into thiol-ene reaction. We synthesized photobase generator 2-(2-nitrophenyl) propyl oxycarbonyl-hexylamine (NPPOC-HA) and amine amplifier. NPPOC-HA has UV absorption above 300 run, and photolysis products are amine and styrene, no free radical produced. Next, we used phototriggered amine proliferation initiated via UV light to control the thiol-ene click reaction, reducing side effects. RTIR was adopted to monitor infrared absorption peaks change of -SH and -C=C, integrating peak area to verify the equal proportion reaction of thiol-ene. UV phototriggered base proliferation reaction, which integrated the safety and strong penetrating ability of UV photopolymerization as well as Domino free radical photopolymerization based on phototriggered base proliferation reaction, is expected to expand the application of thiol-ene Michael addition reaction.
机译：硫醇-烯光点击反应的自由基反应不是理想的点击化学类型，存在单体均聚和低单体转化率的存在，而且不可控，难以获得目标产物。本文将光引发的碱扩散和紫外光聚合反应引入硫醇-烯反应中。我们合成了光碱产生剂2-（2-硝基苯基）丙基氧羰基-己胺（NPPOC-HA）和胺放大器。 NPPOC-HA的紫外线吸收超过300运行，光解产物是胺和苯乙烯，不产生自由基。接下来，我们使用通过紫外线引发的光触发胺增殖来控制硫醇-烯点击反应，从而减少了副作用。采用RTIR监测-SH和-C = C的红外吸收峰变化，积分峰面积以验证硫醇-烯的等比例反应。结合了基于光引发的碱增殖反应的紫外线光聚合以及多米诺自由基光聚合的安全性和强大的穿透能力的UV光引发的碱增殖反应，有望扩展硫醇-烯迈克尔加成反应的应用。

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