The addition of diethyl phosphite to cyclic imines bearing alkyl, aryl, or heteroaryl substituents at the α-position in diethyl ether at room temperature presents an efficient route to substituted cyclic α-aminophosphonates. The application of boron trifluoride-diethyl ether complex as a catalyst significantly accelerates the reaction. diethyl phosphonate - cyclic imines - addition reactions - α-aminophosphonates
Linear or cyclic aminophosphonates as pH markers in phosphorus 31 NMR spectroscopy
申请人:Centre National de la Recherche Scientifique (CNRS)
公开号:US06528656B1
公开(公告)日:2003-03-04
Linear or cyclic aminophosphonates are disclosed which are useful as pH markers. A method of using the linear or cyclic aminophosphonates in phosphorus-31 NMR spectroscopy is also disclosed.
Deoxygenative Nucleophilic Phosphonation and Electrophilic Alkylation of Secondary Amides: A Facile Access to Quaternary α-Aminophosphonates
作者:Jiaxiang Lu、Zhenghua Li、Li Deng
DOI:10.1021/jacs.3c14517
日期:2024.2.21
synthetic accessibility of amides render them valuable precursors for the synthesis of diverse nitrogen-containing compounds. Herein, we present a metal-free and streamlined synthetic strategy for the synthesis of quaternary α-aminophosphonates. This approach involves sequential deoxygenative nucleophilic phosphonation and versatile electrophilic alkylation of secondaryamides in a one-pot fashion. Notably