Provided are methods for the efficient stereoselective formation of glycosidic bonds, without recourse to prosthetic or directing groups.
提供了一种高效立体选择性形成糖苷键的方法,无需使用假体或定向基团。
Facile Dearomatization of Nitrobenzene Derivatives and Other Nitroarenes with N-Benzyl Azomethine Ylide
作者:Sunyoung Lee、Isabelle Chataigner、Serge R. Piettre
DOI:10.1002/anie.201005779
日期:2011.1.10
Breaking the aromaticity barrier: Nitrobenzenederivatives and othernitroarenes smoothly react at room temperature with an azomethineylide to yield polycyclic adducts in high yields (see scheme; Bn=benzyl, TFA=trifluoroacetic acid). This unprecedented loss of aromaticity delivers scaffolds prone to a number of potentially interesting derivatizations.
Reagent Controlled β-Specific Dehydrative Glycosylation Reactions with 2-Deoxy-Sugars
作者:John Paul Issa、Dina Lloyd、Emily Steliotes、Clay S. Bennett
DOI:10.1021/ol4018547
日期:2013.8.16
2-deoxy-sugar hemiacetals for glycosylation presumably by converting them into glycosyl sulfonates in situ. By matching the leaving group ability of the sulfonate with the reactivity of the donor, it is possible to obtain β-specific glycosylationreactions. The reaction serves as proof of the principle that, by choosing promoters that can modulate the reactivity of active intermediates, it is possible to place
Searcey, M.; Pye, P. L.; Lee, J. B., Synthetic Communications, 1989, vol. 19, # 7,8, p. 1309 - 1316
作者:Searcey, M.、Pye, P. L.、Lee, J. B.
DOI:——
日期:——
Reactions of 1-arenesulfonyl-4-nitroimidazoles with aniline in aqueous methanol solution
作者:Jerzy Suwiński、Ewa Salwińska
DOI:10.1016/s0040-4020(01)85642-8
日期:1994.1
Several 1-arenesulfonyl-4-nitroimidazoles were obtained and reacted with aniline in methanol-water medium at 65-70 degrees C to yield mixtures of 1-arenesulfonylamide. 1-arenesulfonylamlide. 4-nitro-1-phenylimidazole and 4(5)-nitroimidazole in varied proportions depending on the arenesulfonyl group.