Biomass-derived di-ethers, 2,5-bis(alkoxymethyl)furans (BAMFs), are currently envisaged as promising biodiesel or additives. Herein, Zr-SBA prepared by a urea hydrolysis method (Zr-SBA-UH) is used as a highly active bifunctional catalyst for the reductive etherification of 5-hydroxymethyl...
Furan and 2-methylfuran yield 2-butene-1,4-dial and 4-oxo-2-pentenal, respectively, with cis/trans ratios 95/5 and 97/3. Due to the presence of water the aldehydes enter equilibria towards hydrates and are not isolated in a pure state. Conditions: furan or the (di)methylfuran (10mmo...
KUKHAREV; O.G. KULINKOVICH; N. DE KIMPE; K.A. TEHRANI: ' A convenient synthesis of 3-functionalized 5-alkoxymethyl- and 5-phenoxymethyl-2(5H)-furanones and their transformations into related epoxy and methylene lactones ' TETRAHEDRON vol. 54, no. 9, 1998, pages 1801 - 1808...
5) 5-alkoxy-3,4-dihalo-5H-furan-2-one 5-烷氧基-3,4-二卤-2(5H)-呋喃酮 1. Four α,ω-diamines, serving as nucleophiles, were reacted with 5-alkoxy-3,4-dihalo-5H-furan-2-one in the presence of triethylamine to give sixteen new compounds. 在三乙胺作用下,亲核试剂α,ω-二...
Compounds of formula (I) <CHEM> in which X is H, F, Cl, Br, I, C1-4alkyl, CN, NO2, SO2NH2, COOH, CHO, C1-4alkoxy, CH2OH, CF3, SO2CH3, SO2CF3 or CO2CaH2a+1 wherein a is 1-5, or any accessible combination thereof of up to 3 substituents; R is H or C1-4alkyl; an...
furan derivativesChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is ...
Shortly after this report, the group of Albizati reported that α,α-dialkoxy trialkylsilylenol ethers such as 73 are very good three-carbon cycloaddition partners in a Lewis acid-induced (4+3) reaction with furan derivatives.31 Although several Lewis acids successfully promoted the reaction in...
methyl), lower alkoxy (preferably methoxy), halogen (preferably chlorine or bromine), amino and hydroxy; 2-pyridyl with a phenyl, carbocyclic or cyclic ether ring containing 2 oxygen atoms fused to it; 2-thiazolyl; 3-isothiazolyl optionally substituted by chlorine or bromine; 3-(1,2,5)-...
furan derivativesThe 4-alkoxyfuranones (III) are prepared by reaction of tetronic acid (I) with the primary or secondary alcohols (II) in the presence of concentrated sulfuric acid.doi:10.1002/chin.198851184ZIMMER, H.AMER, A.CHIEM VAN PHAM, CHIEM VAN PHAM...
Compound of general formula (I)in which R1 represents an alkyl or cycloalkylmethyl group, X1 represents a hydrogen or halogen atom or an alkoxy group, or alternatively OR1 and X1 together represent an -OCH2O-, -O(CH2)2-, -O(CH2)3-, -O(CH2)2O- or -(CH2)3O- group, X2 rep...