efficient electrochemical Ni-catalyzed alkene hydrogenation is described. The reaction features outstanding substrate generality and functional group compatibility, and distinct chemoselectivity. Notably, hydrodebromination of alkyl and aryl bromides can be realized using the same reaction system with a different ligand, and high chemoselectivity between hydrogenation of alkene and hydrodebromination could
3-(Dimethylamino)-1-propylamine: A Cheap and Versatile Reagent for Removal of Byproducts in Carbohydrate Chemistry
作者:Sofie Meng Andersen、Mads Heuckendorff、Henrik H. Jensen
DOI:10.1021/acs.orglett.5b00041
日期:2015.2.20
Inexpensive 3-(dimethylamino)-1-propylamine (DMAPA) was found to be effective in anomeric deacylation reactions giving 1-O deprotected sugars in high yield as precursors for the formation of imidate glycosyl donors. DMAPA was also found to be useful for removing excess reagents such as benzoyl chloride, tosyl chloride, and 2,2,2-trifluoro-N-phenylacetimidoyl chloride. The deacylation reaction could be conducted in moist THF and did not require chromatographic purification since an acidic wash was sufficient to remove excess reagent and the formed byproduct.
Szeja, Wieslaw, Polish Journal of Chemistry, 1980, vol. 54, # 6, p. 1301 - 1304
作者:Szeja, Wieslaw
DOI:——
日期:——
The Constitution of Inulin. Synthesis of 3,4,6- and 1,4,6-Trimethyl-γ-fructose
作者:T. N. Montgomery
DOI:10.1021/ja01317a042
日期:1934.2
Acyl chloride/DABCO-promoted acetal migration of 1,2:4,5-di-O-isopropylidene-d-fructopyranose
作者:Xiang-Bao Meng、Yun-Feng Li、Zhong-Jun Li
DOI:10.1016/j.carres.2007.02.005
日期:2007.6
An unprecedented acetal migration was observed when 1,2:4,5-di-O-isopropylidene-D-fructose was treated with various acyl chlorides and 1,4-diaza-bicyclo [2.2.2]octane (DABCO). 2,3:4,5-Di-O-isopropylidene-D-fructose derivatives were isolated as the only product in high to quantitative yields. The acylium cations generated in situ were speculated as the electrophilic species to initiate the migration process. (c) 2007 Elsevier Ltd. All rights reserved.