Results 211 to 220 of about 171,840 (265)

ChemInform Abstract: The Chemistry of 2(5H)‐Furanones

ChemInform, 2002
AbstractChemInform 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 trackable via the “References” option.
Ahmed Hashem, Erich Kleinpeter
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A calorimetric and computational study on the thermochemistry of 2-(5H)-furanone and 2-(5H)-thiophenone

The Journal of Chemical Thermodynamics, 2010
Abstract In the present work, a combined experimental and computational thermochemical study of 2-(5H)-furanone and 2-(5H)-thiophenone was carried out. The standard ( p ∘ = 0.1 MPa ) molar enthalpies of formation, in the liquid phase, for the 2-(5H)-furanone and 2-(5H)-thiophenone, at T = 298.15 K, were derived from the standard ...
Manuel A. V. Ribeiro da Silva, Ana Filipa L. O. M. Santos, Luísa M. P. F. Amaral   +2 more
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ChemInform Abstract: A Novel 3(2H)‐Furanone‐2(5H)‐Furanone Rearrangement.

ChemInform, 1987
AbstractReaction of the 3(2H)‐furanones (I) with the phosphorodiamidic chloride (II) and the anilines (III) results in the formation of the rearranged 2(5H)‐furanones (IV).
R. A. MACK, V. ST. GEORGIEV
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α-Pyrones and a 2(5H)-furanone from Hyptis pectinata

Phytochemistry, 2003
Three pyrones and a 2(5H)-furanone, designated pectinolides D-G, have been isolated from the dichloromethane extract of Hyptis pectinata. The metabolites were characterized on the basis of 1D and 2D NMR spectroscopic techniques. The pyrones were identified as 6S-[3S,6S-(diacetoxy)-5R-hydroxy-1Z-heptenyl]-5S-hydroxy-5,6-dihydro-2H-pyran-2-one (1 ...
Dionne M, Boalino, Joseph D, Connolly, Stewart, McLean, William F, Reynolds, Winston F, Tinto   +4 more
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1,3-Dipolar cycloadditions to 5-methoxy-2(5H)-furanone

Tetrahedron, 1993
Various nitrile oxides and nitrones, ethyl diazoacetate and an azomethine ylide were examined in 1,3-dipolar cycloadditions to 5-methoxy-2[5H]-furanone, in particular with respect to regio- and diastereoselectivities. Isoxazoles 13-17 and isoxazolidines 21, 22 and 24 were obtained in high yields with and-facial selectivities and regioselectivities ...
Keller, E, de Lange, B, Rispens, MT, Feringa, Bernard   +3 more
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Catalytic kinetic resolution of 5-alkoxy-2(5H)-furanones

Tetrahedron, 1994
The kinetic resolution of racemic 5-alkoxy-2(5H)-furanones, using a chiral aminoalcohol catalyzed 1-4-addition of arylthiols, was examined. Using various butenolides it was shown that a gamma-alkoxy substituent appears to be essential to reach high enantioselectivities whereas electron-donating substituents in the arylthiols also increase the ...
Faber, Wijnand S., Kok, Johan, de Lange, Ben, Feringa, Ben L.   +3 more
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ChemInform Abstract: New Methods for the Synthesis of 3(2H)‐Furanones and 2(5H)‐Furanones.

Chemischer Informationsdienst, 1984
AbstractDie Cyclisierung der Acetylenalkohole (I) mit Säuren oder mit dem Kationen‐Austauscher‐Reagens Hg/Nafion‐H (III) führt zu den 3‐Furanonen (II) bzw. den 2‐Furanonen (IV).
H. SAIMOTO, S. MATSUBARA, K. OSHIMA, T. HIYAMA, H. NOZAKI   +4 more
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ChemInform Abstract: A New Synthesis of Novel Tricyclic 2(5H)‐Furanone Heterocycles from 3,4,5‐Trichloro‐2(5H)‐furanone.

ChemInform, 2010
AbstractStarting from mucochloric acid (I) new heterocycles of type (IV), (VI), and (VII) are prepared.
Jian Ren, Dan‐Dan Ma, Yu Sha, Feng Li, Mao‐Sheng Cheng   +4 more
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2(3H)- and 2(5H)-Furanones. III. An Efficient Synthesis and the Eschenmoser-Mannich Reaction of N-Substituted 4-Amino-2(5H)-furanones

HETEROCYCLES, 1988
Synthese a partir d'acides tetroniques et d'amines; reaction avec le sel d'Eschenmoser conduisant aux derives dimethylaminomethyl ...
Takefumi Momose, Naoki Toyooka, Takafumi Nishi, Yumi Takeuchi   +3 more
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ChemInform Abstract: 2(3H)‐ and 2(5H)‐Furanones. Part 4. The Di‐π‐methane Rerrangement of 3,4‐Dibenzyl‐2(5H)‐furanone.

ChemInform, 1993
AbstractChemInform 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 trackable via the “References” option.
T. MOMOSE, G. TANABE, H. TSUJIMORI, O. MURAOKA   +3 more
openaire   +1 more source