Carbene intermediates in the reaction of trialkyl phosphites with dialkyl aroylphosphonates: formation of novel quasiphosphonium ylides
作者:D. Vaughan Griffiths、John C. Tebby
DOI:10.1039/c39860000871
日期:——
Reaction of trialkylphosphites with dialkyl aroylphosphonates leads to the formation of anionic intermediates which, in the absence of electrophiles, undergo cleavage at temperatures above about 80 °C to give carbene intermediates; these undergo intramolecular carbene insertion reactions or are trapped by trialkylphosphites to give novel ylides.
Griffiths, D. Vaughan; Griffiths, Penelope A.; Whitehead, Belinda J., Journal of the Chemical Society. Perkin transactions I, 1992, # 4, p. 479 - 484
作者:Griffiths, D. Vaughan、Griffiths, Penelope A.、Whitehead, Belinda J.、Tebby, John C.
DOI:——
日期:——
GRIFFITHS D. V.; TEBBY J. C., J. CHEM. SOC. CHEM. COMMUN.,(1986) N 11, 871-872
作者:GRIFFITHS D. V.、 TEBBY J. C.
DOI:——
日期:——
Enantioselective Synthesis of Tertiary α-Hydroxy Phosphonates Catalyzed by Carbohydrate/Cinchona Alkaloid Thiourea Organocatalysts
作者:Shasha Kong、Weidong Fan、Guiping Wu、Zhiwei Miao
DOI:10.1002/anie.201204287
日期:2012.8.27
A pinch of sugar: The new bifunctional carbohydrate/cinchonine‐based thiourea 1 has been designed for the asymmetric addition reaction of α‐ketophosphonates and trimethylsilyl cyanide, the product of which can be hydrolyzed to afford tertiary α‐hydroxy phosphonates with excellent enantioselectivities.
allowing effective control of the end of the reaction and identification of all phosphorylated intermediate species, which enabled us to propose a reaction mechanism. Optimized experimental conditions were applied to the preparation of biological relevant aminoalkyl-HMPPs. A preliminary study of the complexation to hydroxyapatite (bone matrix) was carried out in order to verify its lower affinity towards