Synthesis of Alkenylphosphonates through Palladium-Catalyzed Coupling of α-Diazo Phosphonates with Benzyl or Allyl Halides
作者:Yujing Zhou、Fei Ye、Xi Wang、Shuai Xu、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.5b00629
日期:2015.6.19
method for the synthesis of organophosphonates through palladium-catalyzed coupling of α-diazo phosphonates with benzyl or allyl halides has been developed. Trisubstituted alkenylphosphonates bearing versatile functional groups can be easily accessed in good yields and with excellent stereoselectivity through this method. Moreover, with similar strategy α-substituted vinylphosphonates can also be attained
Dirhodium Carboxylates Catalyzed Enantioselective Coupling Reactions of α-Diazophosphonates, Anilines, and Electron-Deficient Aldehydes
作者:Cong-Ying Zhou、Jing-Cui Wang、Jinhu Wei、Zhen-Jiang Xu、Zhen Guo、Kam-Hung Low、Chi-Ming Che
DOI:10.1002/anie.201206551
日期:2012.11.5
Chiral dirhodiumcarboxylate complexes ([Rh2(S‐PTAD)4] or [Rh2(S‐PTTL)4], see scheme) efficiently catalyze asymmetric three‐component couplingreactions of α‐diazophosphonates, anilines, and electron‐deficient aldehydes to give α‐amino‐β‐hydroxyphosphonates. The high level of enantiocontrol provides evidence for the intermediacy of metal‐bound ammonium ylide in the product‐forming step.
Abstract Through the Cu(I)-catalyzed coupling of diazophosphonates with terminalalkynes, an efficient method for the synthesis of allenylphosphonates has been developed. Simple and inexpensive CuI is used as the catalyst and the reaction is conducted under mild conditions. Through the Cu(I)-catalyzed coupling of diazophosphonates with terminalalkynes, an efficient method for the synthesis of allenylphosphonates