Chen Chaohuang, Daniliuc Constantin G, Mück-Lichtenfeld Christian, Kehr Gerald, Erker Gerhard
Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany.
J Am Chem Soc. 2020 Nov 18;142(46):19763-19771. doi: 10.1021/jacs.0c10078. Epub 2020 Nov 9.
Insertion of sulfur into the B-H bond of the BH borenium salt [IMes(CF)BH] followed by deprotonation gave the thioxoborane IMes(CF)B═S. Subsequent treatment with additional sulfur gave the corresponding boron persulfide, a NHC-stabilized boradithiirane. The B═S compound reacted with carbon dioxide in the presence of the lithium salt Li[B(CF)] by formal [2+2] cycloaddition to give a boron thiocarbonate-type product. The boron persulfide formally inserted phenyl acetylene into the B-S bond in the presence of Li[B(CF)] to give the respective five-membered heterocycle.
将硫插入硼鎓盐[IMes(CF)BH]的B-H键中，随后进行去质子化反应，得到硫代硼烷IMes(CF)B═S。用额外的硫进行后续处理，得到相应的过硫化硼，即一种NHC稳定的硼二硫杂环丙烷。在锂盐Li[B(CF)]存在下，B═S化合物通过正式的[2+2]环加成反应与二氧化碳反应，生成一种硫代碳酸硼酯型产物。在Li[B(CF)]存在下，过硫化硼将苯乙炔正式插入B-S键中，得到相应的五元杂环。
