A sulfonium ylide participated alkylation and arylation under transition-metal free conditions is described.The disparate reaction pattern allowed the separate activation of non-ylidic S-alkyl and S-aryl bond.Under ac...A sulfonium ylide participated alkylation and arylation under transition-metal free conditions is described.The disparate reaction pattern allowed the separate activation of non-ylidic S-alkyl and S-aryl bond.Under acidic conditions,sulfonium ylides serve as alkyl cation precursors which facilitate the alkylations.While under alkaline conditions,cleavage of non-ylidic S-aryl bond produces O-arylated compounds efficiently.The robustness of the protocols were established by the excellent compatibility of wide variety of substrates including carbohydrates.展开更多
The mechanism of Rh（Ⅱ） carbene S-H insertion into H2S in gas phase has been studied by B3LYP functional. Calculation results showed that the Rh（Ⅱ） carbene S-H insertion into H2S took only stepwise channels and n...The mechanism of Rh（Ⅱ） carbene S-H insertion into H2S in gas phase has been studied by B3LYP functional. Calculation results showed that the Rh（Ⅱ） carbene S-H insertion into H2S took only stepwise channels and no concerted channels had been located, which was different from the Rh（Ⅱ） carbene C-H and O-H insertions.展开更多
基金Financial support from National Natural Science Foundation of China(Nos.21877043,21702068,21772050,22025102)the Fundamental Research Funds for the Central Universities,HUST(Nos.2019kfyXKJC080,2019JYCXJJ046)Huazhong University of Science and Technology are greatly appreciated。
文摘A sulfonium ylide participated alkylation and arylation under transition-metal free conditions is described.The disparate reaction pattern allowed the separate activation of non-ylidic S-alkyl and S-aryl bond.Under acidic conditions,sulfonium ylides serve as alkyl cation precursors which facilitate the alkylations.While under alkaline conditions,cleavage of non-ylidic S-aryl bond produces O-arylated compounds efficiently.The robustness of the protocols were established by the excellent compatibility of wide variety of substrates including carbohydrates.
文摘The mechanism of Rh（Ⅱ） carbene S-H insertion into H2S in gas phase has been studied by B3LYP functional. Calculation results showed that the Rh（Ⅱ） carbene S-H insertion into H2S took only stepwise channels and no concerted channels had been located, which was different from the Rh（Ⅱ） carbene C-H and O-H insertions.
