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Raphaël RobietteNathalie Defacqz Jimmy StofferisJacqueline Marchand-Brynaert 《Tetrahedron》2003,59(23):4167-4175
N-Butadienylsuccinimide (1), iso-propyl N-butadienyl-(S)-pyroglutamate (5) and N-butadienyl-(R)-4-phenyloxazolidin-2-one (6) reacted with vinylphosphonates, vicinally-substituted (2) by electronwithdrawing groups (CO2Me, CN, COMe), to furnish [4+2] cycloadducts (3-4,7-10, and 11-14) in moderate to good yields (40-88%). The reactions were highly selective: regioselectivity of 95-100%, endoselectivity of 75-92% and facial selectivity of 80-95%. The major diastereoisomers were fully characterized by 1H and 13C NMR spectroscopy. 相似文献
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C. Friedheim C. Castendyck W. H. Henderson A. Pinagel F. Kehrmann B. Flürscheim C. Matignon F. Bourion Ed. Defacqz und P. Nicolardot 《Fresenius' Journal of Analytical Chemistry》1909,48(3):189-194
Ohne Zusammenfassung 相似文献
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F. Regelsberger F. Sibbers A. E. Hunt G. H. Clapp J. O. Handy Balland H. Moissan E. Defacqz D. Vitali M. Jean E. Kohn-Abrest G. Klemp E. Donath und H. von Jüptner 《Fresenius' Journal of Analytical Chemistry》1906,45(3-4):242-254
Ohne Zusammenfassung 相似文献
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Bernard Tinant Nathalie Defacqz Raphaël Robiette Roland Touillaux Jacqueline Marchand-Brynaert 《Phosphorus, sulfur, and silicon and the related elements》2013,188(2):389-402
Stereochemistry (absolute or relative) of four compounds have been established by x-ray diffraction analysis, namely: 3(R)-[4′(R)-(phenyl) oxazolidin-2-one-1-yl]-4(S)-dimethoxyphosphoryl-4-methoxycarbonyl-1-cyclohexene (7), 3(R)-[4′-(R)-(phenyl)-oxazolidin-2-thione-1-yl]-4(S)dimethoxyphosphoryl-4-methoxycarbonyl-1-cyclohexene (8), methyl 1dimethoxyphosphoryl-2-succinimido-3,4-epoxy-cyclohexane-1-carboxylate (9), and 3-succinimido-4-methylcarbonyl-5-dimethoxyphosphoryl-1-cyclohexene (10). The ring conformations deduced from NMR analysis were thus fully confirmed. 相似文献
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