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Selective O-difluoromethylation of 1,3-diones using S-(difluoromethyl) sulfonium salt 被引量:2
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作者 Guo-Kai Liu Xin Li +4 位作者 Wen-Bing Qin Wei-Feng Lin Li-Ting Lin Jia-Yi Chen Jian-Jian Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2019年第8期1515-1518,共4页
A facile and highly efficient approach for selective O-difluoromethylation of 1,3-diones by recently developed bench-stable S-(difluoromethyl)sulfonium salt was described.And a broad range of difluoromthyl enol ethers... A facile and highly efficient approach for selective O-difluoromethylation of 1,3-diones by recently developed bench-stable S-(difluoromethyl)sulfonium salt was described.And a broad range of difluoromthyl enol ethers were readily accessed in good to excellent yields under mild reaction conditions.Mechanistic studies revealed that the O-difluoromethylation reaction proceeds mainly via a difluorocarbene pathway. 展开更多
关键词 DIFLUOROCARBENE difluoromethyl ENOL ethers 1 3-Diones O-difluoromethylation S-(difluoromethy)sulfonium salt
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Synthesis of difluoromethylated benzylborons via rhodium(Ⅰ)-catalyzed fluorine-retainable hydroboration of gem-difluoroalkenes 被引量:1
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作者 Yuanhong Cai Donghang Tan +3 位作者 Qiqi Zhang Wenxin Lv Qingjiang Li Honggen Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第1期417-420,共4页
The synthesis of bo rylated orga nofluorines is of great interest due to their potential values as synthons in modular construction of fluorine-containing molecules.Reported herein is a rhodium-catalyzed hydrobo ratio... The synthesis of bo rylated orga nofluorines is of great interest due to their potential values as synthons in modular construction of fluorine-containing molecules.Reported herein is a rhodium-catalyzed hydrobo ration of arylgem-difluoroalkenes leading to a series of α-difluoromethylated benzylborons.The use of cationic rhodium catalyst and a biphosphine ligand with large bite angle was crucial for reactivity by offering good regioselectivity and diminishing the undesired β-F elimination.Preliminary derivatizations of the products were conducted to showcase the utility of this protocol. 展开更多
关键词 RHODIUM HYDROBORATION difluoromethy gem-Difluoroalkene β-F elimination
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