作者:Bart Verbraeken、Jan Hullaert、Joachim van Guyse、Kristof Van Hecke、Johan Winne、Richard Hoogenboom
DOI:10.1021/jacs.8b10918
日期:2018.12.19
Cyclic imino ether heterocycles are used as ligands in transition metal catalysis, in various drugs and as reactive monomers in living cationic ring-opening polymerization (CROP). While five- and six-membered cyclic imino ethers, i.e. 2-oxazolines and 4,5-dihydro-1,3-oxazines, have extensively been studied in these areas, their seven-membered ring counterparts have remained unexplored. Herein, we report
环状亚氨基醚杂环用作过渡金属催化、各种药物中的配体以及活性阳离子开环聚合 (CROP) 中的反应单体。虽然五元和六元环状亚氨基醚,即 2-恶唑啉和 4,5-二氢-1,3-恶嗪,已在这些领域得到广泛研究,但它们的七元环对应物仍未得到探索。在此,我们报告了 2-phenyl-4,5,6,7-tetrahydro-1,3-oxazepine 的合成,允许将较早的、错误报告的 4,5,6,7-tetrahydro-1,3-oxazepine 重新分配为它们的 N-酰化吡咯烷异构体。最后,我们还报告了具有 2-碳、3-碳和 4-碳亚甲基桥的同源系列环状亚氨基醚的 CROP 反应性的比较,揭示了显着的环尺寸效应。