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Cascade Alternating Metathesis Cyclopolymerization of Diynes and Dihydrofuran
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-04-18 , DOI: 10.1021/acsmacrolett.2c00140 Xuelin Sui 1 , Will R Gutekunst 1
ACS Macro Letters ( IF 5.1 ) Pub Date : 2022-04-18 , DOI: 10.1021/acsmacrolett.2c00140 Xuelin Sui 1 , Will R Gutekunst 1
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Ruthenium alkoxymethylidene complexes have recently come into view as competent species for metathesis copolymerization reactions when coupled with appropriate comonomer targets. Here, we explore the ability of Fischer-type carbenes to participate in cascade alternating metathesis cyclopolymerization (CAMC) through facile terminal alkyne addition. The combination of diyne monomers and an equal feed ratio of low-strain dihydrofuran leads to a controlled chain-growth copolymerization with high degrees of alternation (>97% alternating diads) and produces degradable polymer materials with low dispersities and targetable molecular weights. When combined with enyne monomers, this method is amenable to the synthesis of alternating diblock copolymers that can be fully degraded to short oligomer fragments under aqueous acidic conditions. This work furthers the potential for the generation of functional metathesis materials via Fischer-type ruthenium alkylidenes.
中文翻译：
二炔和二氢呋喃的级联交替复分解环聚合
当与适当的共聚单体目标偶联时，钌烷氧基亚甲基配合物最近被视为复分解共聚反应的有效物质。在这里，我们探讨了 Fischer 型卡宾通过简单的末端炔烃加成参与级联交替复分解环聚合 (CAMC) 的能力。二炔单体和低应变二氢呋喃等进料比的组合导致具有高交替度（> 97％交替二元组）的受控链增长共聚，并产生具有低分散性和目标分子量的可降解聚合物材料。当与烯炔单体结合时，该方法适用于合成交替二嵌段共聚物，这些共聚物可以在酸性水溶液条件下完全降解为短的低聚物片段。
更新日期：2022-04-18
中文翻译：
二炔和二氢呋喃的级联交替复分解环聚合
当与适当的共聚单体目标偶联时，钌烷氧基亚甲基配合物最近被视为复分解共聚反应的有效物质。在这里，我们探讨了 Fischer 型卡宾通过简单的末端炔烃加成参与级联交替复分解环聚合 (CAMC) 的能力。二炔单体和低应变二氢呋喃等进料比的组合导致具有高交替度（> 97％交替二元组）的受控链增长共聚，并产生具有低分散性和目标分子量的可降解聚合物材料。当与烯炔单体结合时，该方法适用于合成交替二嵌段共聚物，这些共聚物可以在酸性水溶液条件下完全降解为短的低聚物片段。
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