On prepare des phosphonamides derivees du benzodiazaphosphole et on effectue l'olefination asymetrique de plusieurs cyclohexanones substituees
制备苯并二氮杂磷衍生物的膦酰胺衍生物等对烯化不对称环己酮取代物的影响
The preparation and reactions of chiral phosphorous acid diamides
作者:Kevin J. Koeller、Christopher D. Spilling
DOI:10.1016/0040-4039(91)80151-u
日期:1991.10
Chiral phosphorousacid diamides were prepared by condensation of N,N′-disubstituted C2 diamines with PCl3 followed by an equivalent of water. Deprotonation of these acids with n-butyl lithium or LDA gave the lithium salt which reacted smoothly with alkyl halides to give the substituted phosphonamides in good yield.
Chiral Phosphoramide-Catalyzed Enantioselective Addition of Allylic Trichlorosilanes to Aldehydes. Preparative and Mechanistic Studies with Monodentate Phosphorus-Based Amides
作者:Scott E. Denmark、Jiping Fu、Diane M. Coe、Xiping Su、Norman E. Pratt、Brian D. Griedel
DOI:10.1021/jo052202p
日期:2006.2.1
to benzaldehyde promoted by chiral phosphoramides to give the enantioenriched homoallylicalcohol has been investigated. In a survey of Lewis bases as activators for the addition of allyltrichlorosilane to benzaldehyde, phosphorus-based amides have been found to be the most effective promoters. To achieve asymmetric induction, chiral phosphoric triamides derived from chiral diamines have been developed
Electrophilic Amination and Azidation of Chiral α-Alkyl Phosphonamides: Asymmetric Syntheses of α-Amino α-Alkyl Phosphonic Acids†
作者:Stephen Hanessian、Youssef L. Bennani
DOI:10.1055/s-1994-25679
日期:——
Stereoselective electrophilic aminations of chiral non racemic α-alkyl phosphonamides, derived from N,N′-dimethyl (R,R)-1,2-diamino-cyclohexane, proceed with moderate to excellent enantioselectivities. The products are hydrolyzed and reduced to the corresponding α-alkyl α-amino phosphonic acids. The sense of asymmetric induction was confirmed by X-ray crystal structure analysis.
The asymmetric synthesis of α-chloro α-alkyl and α-methyl α-alkyl phosphonic acids of high enantiomeric purity.
作者:Stephen Hanessian、Youssef L. Bennani、Daniel Delorme
DOI:10.1016/s0040-4039(00)97091-6
日期:1990.1
A method is described for the synthesis of α-chloro-α-alkyl- and α-methyl-α-alkylphosphonic acids in either enantiomeric form and in high optical purity, based on the asymmetric alkylation of α-substituted bicyclic phosphonamides derived from a C2 symmetrical diamine.