Palladium Catalyzed Hydrogenation of .alpha.,.beta.-Unsaturated Sulfones and Phosphonates
摘要:
The binuclear palladium complex, [(Bu(2)(t)PH)-PdPBu(2)(t)](2), when treated with oxygen, catalyzes the hydrogenation of the double bond of alpha,beta-unsaturated sulfones and phosphonates in THF at room temperature and 1 atm of hydrogen pressure. Saturated sulfones and phosphonates were isolated in 49-93% yields.
Synthesis of Terminal Vinylphosphonates Via Dbu-Promoted Tandem Phospha-Michael/Elimination Reactions
摘要:
The terminal vinylphosphonates were prepared from various beta-nitroolefins and phosphites through tandem phospha-Michael/elimination reactions. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), a variety of new vinylphosphonates were obtained in moderate to high yields under simple and mild condition. These new compounds were characterized by HRMS, H-1, C-13, and P-31 NMR techniques.
Preparation of Vinylphosphonates from Ketones Promoted by Tf<sub>2</sub>O
作者:Nana Xin、Yongzheng Lv、Yongjian Lian、Zhu Lin、Xian-Qiang Huang、Chang-Qiu Zhao、Yanlan Wang
DOI:10.1021/acs.joc.2c02563
日期:2023.3.3
conditions. Both aryl and alkyl ketones could perform smoothly to give vinyl phosphonates in high to excellent yields. In addition, the reaction was easy to carry out and easy to scale up. Mechanistic studies suggested that this transformation might involve nucleophilic vinylic substitution or a nucleophilic addition–elimination mechanism.
Palladium Catalyzed Hydrogenation of .alpha.,.beta.-Unsaturated Sulfones and Phosphonates
作者:In Sik Cho、Howard Alper
DOI:10.1021/jo00094a001
日期:1994.7
The binuclear palladium complex, [(Bu(2)(t)PH)-PdPBu(2)(t)](2), when treated with oxygen, catalyzes the hydrogenation of the double bond of alpha,beta-unsaturated sulfones and phosphonates in THF at room temperature and 1 atm of hydrogen pressure. Saturated sulfones and phosphonates were isolated in 49-93% yields.
Synthesis of Terminal Vinylphosphonates Via Dbu-Promoted Tandem Phospha-Michael/Elimination Reactions
作者:Hui-Xuan Chen、Lin-Jie Huang、Jin-Biao Liu、Jiang Weng、Gui Lu
DOI:10.1080/10426507.2014.906422
日期:2014.12.2
The terminal vinylphosphonates were prepared from various beta-nitroolefins and phosphites through tandem phospha-Michael/elimination reactions. In the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), a variety of new vinylphosphonates were obtained in moderate to high yields under simple and mild condition. These new compounds were characterized by HRMS, H-1, C-13, and P-31 NMR techniques.