A Convenient Synthesis of Ethyl (Diethoxyphosphoryl) fluoroacetate from Ethyl Fluoroacetate
作者:Elias Elkik、Michèle Imbeaux
DOI:10.1055/s-1989-27412
日期:——
A new synthesis of ethyl (diethoxyphosphoryl)fluoroacetate starting from ethyl fluoroacetate is described for a mole scale. This synthesis does not require the use of special equipment for fluorine chemistry since no hydrogen fluoride is evolved.
Ife,R.J. et al., Journal of the Chemical Society. Perkin transactions I, 1976, p. 1776 - 1783
作者:Ife,R.J. et al.
DOI:——
日期:——
Bergmann,E.D.; Shahak,I., Journal of the Chemical Society, 1960, p. 462 - 463
作者:Bergmann,E.D.、Shahak,I.
DOI:——
日期:——
Probing the Stereochemistry of <i>E. coli</i> 3-Deoxy-<scp>d</scp>-<i>arabino</i>-heptulosonate 7-Phosphate Synthase (Phenylalanine-Sensitive)-Catalyzed Synthesis of KDO 8-P Analogues
作者:Appavu K. Sundaram、Ronald W. Woodard
DOI:10.1021/jo991529l
日期:2000.9.1
The five-carbon phosphorylated monosaccharide analogues, D-arabinose 5-phosphate, D-ribose B-phosphate, and 2-deoxy-D-ribose 5-phosphate, were separately condensed with (Z)- and (E)-[3-H-2]-phosphoenolpyruvate (PEP) in the presence of Escherichia coli 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAH 7-P) synthase (phe) to give in the case of (Z)-[3-H-2]-PEP (3S)-[3-H-2]-3-deoxy-D-manno-octulosonate S-phosphate, (3S)-[3-H-2]-3-deoxy-D-altro-octulosonate 8-phosphate, and (3S)-[3-H-2]-3,5-dideoxy-D-altro-octulosonate 8-phosphate, respectively, whereas incubation with (E)-[3(2)H]-PEP gives the corresponding (3R)-monosaccharides. These results are in complete agreement with the observed facial selectivity of DAH 7-P synthase for its normal substrates D-erythrose 4-phosphate and PEP and provide direct evidence that DAH 7-P synthase (phe) catalyzes the si face addition of the C3 of PEP to the re face of C1 of the phosphorylated monosaccharides tested. Products formed by DAH 7-P synthase (phe)-catalyzed condensation of(Z)- and (E)-[3-F]-PEP with E 4-P were completely characterized by H-1 and F-19 NMR analysis for the first time. Results of our studies suggest that disappearence of the double bond between C2 and C3 of PEP and formation of a bond between C3 of PEP and C1 of the phosphorylated monosaccharide tested occur in concert during the DAH 7-P synthase-catalyzed condensation reaction.
ELKIK, ELIAS;IMBEAUX, MICHELE, SYNTHESIS,(1989) N1, C. 862-864