A convenient two-step one-pot synthesis of phosphonamidates
摘要:
Phosphonamidates are formed in high yield from a one-pot sequential reaction of a phosphonyl dichloride with an alcohol and then an amine in the presence of catalytic 1H-tetrazole. Undesired disubstitution of the phoshphonyl dichloride by the alcohol or the amine is minimal due to the presence of tetrazole. (C) 1997 Elsevier Science Ltd.
The reaction of phosphonic dichlorides with a mixture of benzyl alcohol and an aliphatic alcohol affords a mixture of the corresponding dibenzyl phosphonate, dialkyl phosphonate, and alkyl benzyl phosphonate which is easily separated by column chromatography to give the pure components. Cleavage of the dibenzyl phosphonate by catalytic hydrogenation affords the phosphonic acid whereas cleavage of the alkyl benzyl phosphonate under the same conditions affords the alkyl hydrogen phosphonate (monoester).
Hydrolyse Basique de phosphonates I. Étude qualitative
作者:Henri Christol、Michel̀e Levy、Claude Marty
DOI:10.1016/s0022-328x(00)88699-4
日期:1968.6
The hydrolysis of phosphonates by alkali in aqueousdioxane has been studied. The symmetrical phosphonates are hydrolysed with loss of one ester group to form a monoacid. With the mixed phosphonates the better leaving group is replaced.
Palladium-Catalyzed Desulfitative Cross-Coupling Reaction of Sodium Arylsulfinates with H-Phosphonate Diesters
作者:Tao Miao、Lei Wang
DOI:10.1002/adsc.201300983
日期:2014.3.24
A novel and convenient palladium‐catalyzed cross‐coupling reaction of H‐phosphonate diesters with sodiumarylsulfinates was developed via desulfitation in the presence of silver carbonate and tetra‐butylammonium chloride. This method is highly efficient and provides a rapid access to a broad spectrum of arylphosphonate diesters in good to excellent yields.
Microwave-Assisted Palladium-Catalyzed Cross-Coupling of Aryl and Vinyl Halides with H-Phosphonate Diesters
作者:Marcin Kalek、Asraa Ziadi、Jacek Stawinski
DOI:10.1021/ol801935r
日期:2008.10.16
bond was developed. Using a prevalent palladium catalyst, Pd(PPh3)4, a quantitative cross-coupling of various H-phosphonate diesters with aryl and vinyl halides was achieved in less than 10 min. The reactions occurred with retention of configuration at the phosphorus center and in the vinyl moiety. Using this protocol, several C-phosphonates, including those bearing nucleoside and cholesteryl moieties
Ar–P bond construction by the Pd-catalyzed oxidative cross-coupling of arylsilanes with H-phosphonates via C–Si bond cleavage
作者:Haiqing Luo、Haidong Liu、Xingwei Chen、Keke Wang、Xuzhong Luo、Kejun Wang
DOI:10.1039/c6cc08408g
日期:——
A novel and efficient methodology that allows for the construction of Ar–P bonds via the Pd-catalyzed oxidative cross-coupling reaction of various arylsilanes with H-phosphonates leading to valuable arylphosphonates has been developed.