Rhenium‐Catalyzed Decarboxylative Tri‐/Difluoromethylation of Styrenes with Fluorinated Carboxylic Acid‐Derived Hypervalent Iodine Reagents
作者:Yin Wang、Yunhui Yang、Congyang Wang
DOI:10.1002/cjoc.201900296
日期:2019.12
Herein, unprecedented rhenium‐catalyzed decarboxylative oxytri‐/difluoromethylation and Heck‐type trifluoromethylation of styrenes have been developed by using hypervalent iodine(III) reagents derived from cheap, stable, and easy‐handling fluorinated carboxylic acids. Mechanistic studies revealed a radical decarboxylative trifluoromethylation pathway occurring in these reactions.
The first palladium‐catalyzed method for the arylation of α‐phosphonovinyl nonaflates is described. Using a catalyst comprised of Pd(OAc)2 and SPhos, terminal and internal α‐aryl vinylphosphonates could be efficiently accessed under mild conditions. The reaction features a broad coupling partner scope and tolerates many functional groups.
Synthesis of α-vinylphosphonates from terminal alkynes and H-phosphonates as only the Markovnikov-regioisomer under metal- and solvent-free conditions.
Synthesis of Vinylphosphonates and its First Exploration of Bioactivity
作者:Sheng-Nan Li、Lan-Ting Xu、Yue Chen、Ju-Lian Li、Ling He
DOI:10.2174/157017811796064467
日期:2011.7.1
Phosphonation of β-nitro-alkene with triethyl phosphite was achieved under microwave irradiation using CH2Cl2 as the solvent in the absence of catalyst with moderate to high yields (up to 90%). This method of formation of carbonphosphor bonds is simple, mild, convenient and effective. Synchronously, a number of vinylphosphonates derivatives were synthesized and evaluated biologically preliminary.
A Simple and Efficient Method for One-Pot, Three-Component Synthesis of Terminal Vinylphosphonates Using a Task-Specific Ionic Liquid
作者:Sara Sobhani、Moones Honarmand
DOI:10.1055/s-0032-1317965
日期:——
convenient and practical method for the one-pot, three-componentsynthesis of terminal vinylphosphonates from readily available starting materials (aryl/alkyl/heteroaryl aldehydes, nitromethane and trialkylphosphites) through a tandem Henry–Michael reaction followed by nitro elimination in the presence of 5-hydroxypentylammonium acetate (5-HPAA) as a task-specific ionicliquid, is described. This method offers