一種硼氫三配位硼陽離子衍生的硫酮硼烷及其過硫化物的反應性
作者:
小柯機器人發布時間:2020/11/14 16:33:43
研究人員發現,將硫插入硼氫三配位硼陽離子鹽(BH borenium salt)[IMes(C6F5)BH]+ 的硼–氫鍵中,然後進行去質子化反應,可得到硫酮硼烷 IMes(C6F5)B═S。用額外的硫進一步處理可得到相應的過硫化硼化物,一種氮雜環卡賓硼烷(NHC)穩定的硼二噻烷。
硫酮硼烷在鋰鹽Li[B(C6F5)4]的存在下與二氧化碳發生[2 + 2]環加成反應,可生成一種含硼硫代碳酸酯類化合物。硼二噻烷則可在鋰鹽Li[B(C6F5)4]的存在下將苯乙炔插入其硼-硫鍵,形成相應的五元雜環結構。
附:英文原文
Title: A BH Borenium-Derived Thioxoborane, Its Persulfide, and Their Li+-Induced Reactions with Alkynes and with Carbon Dioxide
Author: Chaohuang Chen, Constantin G. Daniliuc, Christian Mück-Lichtenfeld, Gerald Kehr, Gerhard Erker
Issue&Volume: November 9, 2020
Abstract: Insertion of sulfur into the B–H bond of the BH borenium salt [IMes(C6F5)BH]+ followed by deprotonation gave the thioxoborane IMes(C6F5)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(C6F5)4] 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(C6F5)4] to give the respective five-membered heterocycle.
DOI: 10.1021/jacs.0c10078
Source: https://pubs.acs.org/doi/10.1021/jacs.0c10078