Add to ORKGTwo isomeric pyronopyrones were obtained by cyclization of 2,4-dioxo-4-(4-hydroxy-6-methyl-2-pyrone-3-yl) butyric add ethyl ester in glacial acetic acid or acetic anhydride. The structures of the compounds are discussed on the basis of their infrared, ultraviolet, 1H NMR, 13C NMR and mass \u27Spectra as well as chemical properties observed
The Priedel-Crafts isopropylations of methyl 2-pyrrolecarboxylate, 2-acetylpyrrole, and 2-pyrrolecar...
Malonyl Chloride reacts with alkyl and aryl thiocyanates yielding 2-alkyl- (or aryl) thio-7-chloro-4...
Some new 2,4,6-triarylsubstituted pyridines, which are expected to possess marked biological activit...
Two isomeric pyronopyrones were obtained by cyclization of 2,4-dioxo-4-(4-hydroxy-6-methyl-2-pyrone-...
The Kostanecki acylation of 4-methyl-6-ethyl-8-acetylumbelliferone furnishes two compounds: (A) C18H...
2 : 6-Dihydroxy-1 : 4-pyrone has been obtained from acetone dicarboxylic acid and its various deriva...
The synthesis of 3-hydroxy-4H-pyran-4-one-2-carboxaldehyde has been accomplished by selectively bloc...
Brief treatment of tetrahydro-4-oxoisoxazolo [2,3-a] pyridinium bromide and its 3-methyl derivative...
Prep aration of 3-allyloxy-4-pyrone (II), the Claisen rearrangement of II to 3 .~hydroxy -2-allyl-4 ...
The 4,5,6-triphenyl-2-pyrone I was readily converted to the pyrylium salts II, which und er the infl...
By condensation of meconic acid with 4-chloroaniline, 4-bromoaniline, 3-nitroaniline and 1-naphthyla...
Color poster with text, images, and graphs.Pyran-4-one (-pyrone (C5H4O2)), a conjugated enone, is a ...
By condensation rnf meconic acid, comenic acid, or comenic acid methyl ether with primary aromatic a...
The biosynthesis of tetrapyrroles is briefly discussed and the important intermediates for chemical ...
By the action of four molecules of acetic anhydride on one molecule of acetone dicarboxylic acid a n...
The Priedel-Crafts isopropylations of methyl 2-pyrrolecarboxylate, 2-acetylpyrrole, and 2-pyrrolecar...
Malonyl Chloride reacts with alkyl and aryl thiocyanates yielding 2-alkyl- (or aryl) thio-7-chloro-4...
Some new 2,4,6-triarylsubstituted pyridines, which are expected to possess marked biological activit...
Two isomeric pyronopyrones were obtained by cyclization of 2,4-dioxo-4-(4-hydroxy-6-methyl-2-pyrone-...
The Kostanecki acylation of 4-methyl-6-ethyl-8-acetylumbelliferone furnishes two compounds: (A) C18H...
2 : 6-Dihydroxy-1 : 4-pyrone has been obtained from acetone dicarboxylic acid and its various deriva...
The synthesis of 3-hydroxy-4H-pyran-4-one-2-carboxaldehyde has been accomplished by selectively bloc...
Brief treatment of tetrahydro-4-oxoisoxazolo [2,3-a] pyridinium bromide and its 3-methyl derivative...
Prep aration of 3-allyloxy-4-pyrone (II), the Claisen rearrangement of II to 3 .~hydroxy -2-allyl-4 ...
The 4,5,6-triphenyl-2-pyrone I was readily converted to the pyrylium salts II, which und er the infl...
By condensation of meconic acid with 4-chloroaniline, 4-bromoaniline, 3-nitroaniline and 1-naphthyla...
Color poster with text, images, and graphs.Pyran-4-one (-pyrone (C5H4O2)), a conjugated enone, is a ...
By condensation rnf meconic acid, comenic acid, or comenic acid methyl ether with primary aromatic a...
The biosynthesis of tetrapyrroles is briefly discussed and the important intermediates for chemical ...
By the action of four molecules of acetic anhydride on one molecule of acetone dicarboxylic acid a n...
The Priedel-Crafts isopropylations of methyl 2-pyrrolecarboxylate, 2-acetylpyrrole, and 2-pyrrolecar...
Malonyl Chloride reacts with alkyl and aryl thiocyanates yielding 2-alkyl- (or aryl) thio-7-chloro-4...
Some new 2,4,6-triarylsubstituted pyridines, which are expected to possess marked biological activit...