Highly enantioselective hydrogenation of exocyclic double bond of N-tosyloxazolidinones catalyzed by a neutral rhodium complex and its synthetic applications
作者:Zengming Shen、Xiyan Lu、Aiwen Lei
DOI:10.1016/j.tet.2006.07.024
日期:2006.9
A highly enantioselective synthesis of optically active N-tosyl-4-alkyl-1,3-oxazolidin-2-ones based on the asymmetric hydrogenation of the trisubstituted exocyclic double bond of N-tosyl-4-alkylidene-1,3-oxazolidin-2-ones under the catalysis of neutral [Rh(COD)Cl]2 (COD=1,5-cyclooctadiene) and (S)-(+)-DTBM-SEGPHOS was developed. The utility of this highly enantioselective reaction was exemplified by
Solid-phase synthesis of 3,5-disubstituted 1,3-oxazolidin-2-ones by an activation/cyclo-elimination process
作者:Peter ten Holte、Lambertus Thijs、Binne Zwanenburg
DOI:10.1016/s0040-4039(98)01608-6
日期:1998.10
Polymer-supported sulfonyl chloride is used in the solid-phase synthesis of disubstituted 1,3-oxazolidin-2-ones. The target compounds were prepared by attaching 1,2-diols to the solid support, followed by reaction with p-toluenesulfonyl isocyanate and subsequent cycle-elimination with concurrent detachment from the resin. Oxazolidinones of high enantiopurity can be prepared with this method by employing enantiopure 1,2-diols. (C) 1998 Elsevier Science Ltd. All rights reserved.
MCFARLAND, J. W.;BEAULIEU, J. J.;ARREY, L. N.;FREY, L. M., J. HETEROCYCL. CHEM., 25,(1988) N, C. 1431-1434
作者:MCFARLAND, J. W.、BEAULIEU, J. J.、ARREY, L. N.、FREY, L. M.
DOI:——
日期:——
McFarland, J. W.; Beaulieu, J. J.; Arrey, L. N., Journal of Heterocyclic Chemistry, 1988, vol. 25, p. 1431 - 1434
作者:McFarland, J. W.、Beaulieu, J. J.、Arrey, L. N.、Frey, L. M.