Two new a,b-unsaturated butyrolactone derivatives, 4-(400-hydroxybenzyl)-3-(30-hydroxy-phenethyl)furan-2(5H)-one (1) and 3-(30-hydroxyphenethyl)furan-2(5H)-one (2), together with one known phenolic compound (3), were isolated from the tubers of Pleione bulbocodioides (Franch.) Rolfe. Their structures were elucidated by analysis of spectroscopic data. # 2007 Wen Yuan Gao. Published by Elsevier B...

Abstract. Furans are emitted to the atmosphere during biomass burning from pyrolysis of cellulose. They one major contributing volatile organic compound (VOC) classes OH and NO3 reactivity in plumes. The removal process furans at night is reaction with nitrate radical, NO3. Here, we report a series relative rate experiments 7300 L indoor simulation chamber Institut de Combustion Aérothermique R...

The title compound, C(19)H(30)BrNO(5), was obtained via a tandem asymmetric Michael addition-elimination reaction of 3,4-dibromo-5-[(S)-l-menth-yloxy]furan-2(5H)-one and l-valine in the presence of potassium hydroxide. The mol-ecular structure contains an approximately planar (r.m.s. deviation = 0.0204 Å) five-membered furan-one ring and a six-membered menth-yloxy ring adopting a chair conforma...

The synthesis and structure-activity relationship (SAR) study of a series of 2-(substituted benzylidene)-7-(4-fluorophenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a]pyrimidin-3(7H)-one (4a-4j) derivatives as anticancer agents are described. This series of thiazolopyrimidines were synthesized by the reaction of 7-(4-fluoro phenyl)-5-(furan-2-yl)-2H-thiazolo[3,2-a] pyrimidin-3(7H)-one (3) with appropriat...

The benzyloxy-substituted lactone cyclooxygenase-2 inhibitor DFB [3-[(3,4-difluorobenzyl)oxy]-5,5-dimethyl-4-[4-(methylsulfonyl)phenyl]furan-2(5H)-one] is metabolized in human and rat liver microsomal incubations and hepatocytes to a fluorescent metabolite, DFH [3-hydroxy-5,5-dimethyl-4-[4-(methylsulfonyl)phenyl]furan-2(5H)-one]. This process is CYP3A-mediated in both species, as demonstrated b...

THE TITLE COMPOUND [SYSTEMATIC NAME: (R)-2-trichloro-methyl-3a,3b,7a,8a-tetra-hydro-5H-pyrano[2',3':4,5]furano[2,3-d][1,3]dioxol-5-one], C(9)H(7)Cl(3)O(5), a triyclic system that contains a central α-d-furan-ose ring cis-fused with a dioxolane ring as well as a δ-lactone ring, exhibits a twisted conformation. The CCl(3) group has an axial orientation. The furan-ose ring approximates an envelope...

In this study appropriate hydrazide compounds, furan-2-carboxylic acid hydrazide (1) and phenylacetic acid hydrazide (2) were converted into 1,4-substituted thiosemicarbazides 4a-e and 5a-e and 4-amino-5-(furan-2-yl or benzyl)-4H-1,2,4-triazole-3-thiols 7 and 10. The 1,4-substituted thiosemicarbazides were then converted into 5-(furan-2-yl or benzyl)-4-(aryl)-4H-1,2,4-triazole-3-thiols 8a-e and...

BACKGROUND The formation of novel N-substituted-1,2,3,4-tetrahydro[1,3]-dioxolo-[6,7]-5H-[1]benzopyrano [3,4-c]pyridines were observed unexpectedly during the acid-mediated ketal removal of ethylenedioxy ketal protected 4-piperidones. The literature revealed that benzopyranopyridine derivatives are of scientific interest and some exhibit interesting biological activities. Diastereomeric resolut...

Over the years secondary metabolites have been considered as lead molecules both in their natural form and templates for medicinal chemistry. Some such polyphenols flavan-3-ols exert beneficial effects after a modification by microbiota. Synthetic precursors of some these modified compounds, turn, carried ?-alkylidenebutenolide moiety which characterizes large class bioactive products endowed w...

The title compound, C(20)H(33)ClN(2)O(3), was obtained via a tandem asymmetric Michael addition-elimination reaction of 3,4-dichloro-5-(S)-(l-menth-yloxy)furan-2(5H)-one and 1-ethyl-piperazine in the presence of potassium fluoride. The mol-ecular structure contains an approximately planar five-membered furan-one ring [maximum atomic deviation = 0.024 (2) Å] and two six-membered rings adopting c...