Synthesis and evaluation of d-gluco-pyranocyclopropyl amines as potential glucosidase inhibitors
作者:Martijn D.P. Risseeuw、Richard J.B.H.N. van den Berg、Wilma E. Donker-Koopman、Gijs A. van der Marel、Johannes M.F.G. Aerts、Mark Overhand、Herman S. Overkleeft
DOI:10.1016/j.bmcl.2009.10.022
日期:2009.12
cyclopropylamines were proposed as structurally new glycosidase inhibitors. In this Letter we report our efforts in the synthesis of a set of α-glucose configured oxabicyclo[4.1.0] heptanes, based on this hypothesis, bearing an amine substituent on the propyl ring and reveal that their inhibitory potential towards a range of mammalian glucosidases is modest.
Extending the scope of the Ferrier reaction: fragmentation-rearrangement reactions of selectively substituted 1,2-cyclopropanated glucose derivatives
作者:Muganza Munyololo、David W. Gammon、Ilka Mohrholz
DOI:10.1016/j.carres.2012.01.006
日期:2012.4
Two further variations of the Ferrier-type allylic rearrangements of 1,2-cyclopropanated glucose derivatives bearing an acetoxylated carbon at the 1'-position are described. In the first, treatment of the cyclopropanated sugar with a nucleophile (ROH, PhSH, azide) and Lewis acid (BF3 center dot Et2O or Al(OTf)(3)), gives 2-C-vinyl glucosides in good yields and alpha-selectivities. Alternatively, treatment with a combination of Lewis acid and acetic acid leads to a novel fragmentation-rearrangement to form a 2,3-dehydro-2-formyl-C-glycoside.[GRAPHICS](C) 2012 Elsevier Ltd. All rights reserved.
Efficient Synthesis of Fused Perhydrofuro[2,3-<i>b</i>]pyrans (and Furans) by Ring Opening of 1,2-Cyclopropanated Sugar Derivatives
[structure: see text]. An efficient method has been developed for the construction of fused perhydrofuro[2,3-b]pyrans by diastereoselective ring opening of 1,2-cyclopropanated sugar derivatives. The methodology has been successfully applied to the synthesis of fused perhydrofuro[2,3-b]pyrano-gamma-butyrolactone derivatives.