Hu Guo-Fei, Li Hai-Jun, Zeng Chao, Wang Xiang, Wang Nan, Peng Tai, Wang Suning
Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering , Beijing Institute of Technology , Beijing , China.
Department of Chemistry , Queen's University , Kingston , Ontario K7L 3N6 , Canada.
Org Lett. 2019 Jul 5;21(13):5285-5289. doi: 10.1021/acs.orglett.9b01892. Epub 2019 Jun 20.
Boron compounds (1-4) containing an internal B-O bond have been found to undergo facile multistructural transformations upon irradiation at 365 or 410 nm, generating rare 8-membered B,O-heterocycles (1c-4c). In addition, 2 and 3 also undergo an intramolecular Diels-Alder addition and oxyborane elimination concomitantly, via intermediates 2b/3b, producing 2d/3d. The pathways to isomer c and product d were found to be a thermal process and a photo process, respectively.
已发现含有内部B-O键的硼化合物（1-4）在365或410nm照射下会发生 facile多结构转变，生成罕见的8元B，O-杂环（1c-4c）。此外，2和3还通过中间体2b/3b同时进行分子内狄尔斯-阿尔德加成和氧硼烷消除反应，生成2d/3d。发现生成异构体c和产物d的途径分别是热过程和光过程。
