Results 151 to 160 of about 5,571 (175)

A New Furanone Isolated from a Marine-Derived Actinomycete M159

Chemistry of Natural Compounds, 2015
A new furanone, 5-(4',6'-dihydroxy-6'-methyloctyl)furan-2(5H)-one (1), and a known furanone, 5-(6',7'-dihydroxy-6'-methyloctyl)furan-2(5H)-one (2), were isolated from a marine-derived actinomycete (strain No. M159). The structures of these two compounds were determined on the basis of spectroscopic and chemical data.
Shuju Guo, Hua Su, Xiancui Li, Dayong Shi, Xiaobin Zhu   +4 more
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Catalyst-free diazo cross-coupling to access useful 3(2H)-furanone derivatives

Chemical Communications, 2023
Catalyst-free synthesis of 3(2H)-furanone derivatives has been achieved from metal-free cross-coupling of α-diazo ester and α-aryldiazo ketones.
Amit Vijay Sasane, Rai-Shung Liu
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A new synthesis of 5-methylene-2(5H)-furanone derivatives

Tetrahedron, 1984
Abstract 5-methylene-2(5H)-furanone derivatives are easily obtained by treatment of tertiary 2-furylcarbinols with pyridinium dichromate in dimethylformamide solution. Through this procedure, a natural product, the thiophene lactone isolated from Chamaemelum Nobile L., has been synthesized.
Antonioletti R, D'Auria M, De Mico A, Piancatelli G, Scettri A   +4 more
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Crystal structures of some 3-(hydroxymethylene)dihydro-2(3H)-furanone derivatives

Collection of Czechoslovak Chemical Communications, 1990
The crystal structures of (Z)-3-(p-toluenesulfonyloxymethylene)dihydro-2(3H)-furanone (I), (E)-3-(methanesulfonyloxymethylene)dihydro-2(3H)-furanone (II), and (E)-3-(benzoyloxymethylene)dihydro-2(3H)-furanone (III) were solved by direct methods. The intensities of the diffractions were recorded using MoKα graphite monochromatized radiation, λ = 0.07107
Tadeusz Głowiak, Zdirad Žák, Jaroslav Jonas   +2 more
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ChemInform Abstract: New Methods for Synthesis of Furanone Derivatives Using Dianions.

Chemischer Informationsdienst, 1984
AbstractAusgehend von den Dianionen (III) bzw. (V) bzw. (VIII), deren Herstellung z.Tl. angegeben ist, werden die Furanone (IV) bzw. (VII) bzw. (XI) hergestellt.
K. TANAKA, Y. ISOBE, A. KAJI
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ChemInform Abstract: TRANSFORMATIONS OF 3‐(METHYLENE)DIHYDRO‐2(3H)‐FURANONE DERIVATIVES

Chemischer Informationsdienst, 1985
AbstractWie das E‐konfigurierte Tosylat (Ia) liefert auch das Z‐Isomere (Ib) mit den Verbindungen (II) jeweils die E‐konfigurierten Derivate (III), wobei sich in den Fällen (IIIa) und (IIIb) nachweisen läßt, daß sich die aus (Ib) zunächst gebildeten Z‐Formen von ′ (III) (d.h.
C. MAZAL, Z. JURKA, J. JONAS
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[Antifungal activity of 5-benzilidene pyrrolone and furanone derivatives].

Annales pharmaceutiques francaises, 1991
The antifungal activity against Neurospora crassa of some 5-benzilidene pyrrolone and furanone derivatives was realised. Relations between the structure and this biological activity are established with Fujita-Ban and Hansch methods. The preponderant part of lipophilicity, resonance effect and E or Z configurations have been showed.
M G, de Carvalho, I da R, Pitta, S L, Galdino, G de C, Takaki, G, Bergé   +4 more
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Synthesis of chiral 2(5H)-furanone derivatives with 1,3-butadiyne structure

Research on Chemical Intermediates, 2012
Using CuI as a catalyst, N,N-diisopropylethylamine as ligand, n-butylamine as a base, and CH3CN as solvent, the Glaser reaction of N-[5-(S)-alkoxy-2(5H)-furanonyl] amino acid propargyl esters 1 at room temperature was investigated, and a series of new chiral 2(5H)-furanone derivatives containing 1,3-butadiyne structure have been synthesized as designed,
Jing-Pei Huo, Jin-Feng Xiong, Guang-Zhen Mo, Pai Peng, Zhao-Yang Wang   +4 more
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ChemInform Abstract: REACTIVITY OF 5‐METHYL‐3(2H)‐FURANONES TOWARD SCHIFF BASES; SYNTHESIS OF 5‐STYRYL‐3(2H)‐FURANONE DERIVATIVES

Chemischer Informationsdienst, 1981
AbstractDas 5‐Methyldihydrofuranon (I) reagiert mit Benzaldiminen (II) in Essigsäure über die isolierbaren Zwischenstufen (III) zu Styryl‐furanonen (IV).
B. CHANTEGREL, S. GELIN
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Enzyme Ribonucleotide Reductase:  Unraveling an Enigmatic Paradigm of Enzyme Inhibition by Furanone Derivatives

The Journal of Physical Chemistry B, 2006
Several 2'-substituted-2'-deoxyribonucleotides are potent inactivators of the enzyme ribonucleotide reductase (RNR), by destroying the essential tyrosyl radical located in subunit R2 or/and covalently alkylating the subunit R1. In the absence of external reductants, the inactivation is achieved by alkylation of subunit R1 by a methylene-3(2H)-furanone.
Nuno M F S A, Cerqueira, Pedro A, Fernandes, Maria J, Ramos   +2 more
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