The enantioselective addition of dialkylphosphites to aldehydes: Catalysis by a lanthanum binaphthoxide complex
作者:Nigam P. Rath、Christopher D. Spilling
DOI:10.1016/s0040-4039(00)76517-8
日期:1994.1
The enantioselective addition of dialkylphosphites to aldehydes was catalyzed by a lanthanum (R)-binaphthoxide complex to give (S)-hydroxy phosphonates in good yield and modest enantioselectivity.
Determination of the enantiomeric purity and absolute configuration of α-hydroxy phosphonates
作者:James K. Kozlowski、Nigam P. Rath、Christopher D. Spilling
DOI:10.1016/0040-4020(95)00308-u
日期:1995.6
The absolute configuration of α-hydroxy phosphonates was determined by NMR spectroscopy of the O-methyl mandelate esterderivatives. The O-methyl mandelate ester diastereoisomers are distinguishable by their 1H and 31P NMR spectra and the observed chemicalshifts allow assignment of the absolute configuration of the phosphonate C-1. The crystal structure of (1R) dimethyl 1-[(2′R)-2′-methoxy-2′-phe
α-羟基膦酸酯的绝对构型通过O-甲基扁桃酸酯衍生物的NMR光谱法确定。O-扁桃酸酯非对映异构体的1 H和31 P NMR光谱区分开,观察到的化学位移可确定膦酸酯C-1的绝对构型。(1R)二甲基1的晶体结构- [(2'R)-2'-甲氧基-2'-苯基乙酰氧基] -3-苯基-2- ë丙烯基膦酸酯是通过X射线衍射来确定。该对映体可通过HPLC在手性文具相上分离,因此可以准确地确定羟基膦酸酯的对映体纯度。
Rath Nigam P., Spilling Christopher D., Tetrahedron Lett, 35 (1994) N 2, S 227- 230
作者:Rath Nigam P., Spilling Christopher D.
DOI:——
日期:——
Nafion®-supported oxovanadium-catalyzed hydrophosphonylation of aldehydes under solventless conditions
作者:Shiue-Shien Weng、Guan-Ying Lin、Hsin-Chun Li、Kuo-Chen Yang、Teng-Mao Yang、Hui-Chi Liu、Syuan-Hua Sie
DOI:10.1002/aoc.2879
日期:2012.9
A Nafion® resin‐supported oxovanadium(IV) catalyst was readily prepared via ion‐exchange method. This solid vanadyl perfluorinated sulfonate catalyst was used as an efficient and recoverable catalyst for the hydrophosphonylation of various aldehydesundersolventlessconditions at room temperature. The catalyst could be recovered by simple filtration and reused without a significant loss of activity
Highly Enantioselective Aerobic Oxidation of α-Hydroxyphosphonates Catalyzed by Chiral Vanadyl(V) Methoxides Bearing <i>N</i>-Salicylidene-α-aminocarboxylates
作者:Vijay D. Pawar、Sampada Bettigeri、Shiue-Shien Weng、Jun-Qi Kao、Chien-Tien Chen
DOI:10.1021/ja060639o
日期:2006.5.1
An unprecedented vanadyl(V) methoxide complex 4 derived from 3,5-dibromo-N-salicylidene-l-tert-leucinate enables highly enantioselective aerobic oxidations of α-hydroxyphosphonates at ambient temperature with selectivity factors ranging from 3 to >99.