Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Celia B. Schapira"'
Publikováno v:
Synthesis. 2006:1971-1974
An improved method for the synthesis of 4-hydroxy-2-methyl-l-oxo-1,2-dihydroisoquinoline-3-carboxylic acid derivatives is described. The synthetic route involves initial phthalic anhydride aminolysis with alkylaminoacetic acid derivatives, further es
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::087858092691e202cfef8a1ecbb2b551
https://doi.org/10.1055/s-2006-942402
https://doi.org/10.1055/s-2006-942402
Publikováno v:
Journal of Heterocyclic Chemistry. 42:493-502
A series of 8-hydroxy-1,6-naphthyridin-5(6H)-one-7-carboxamides 1 and the isomeric 5-hydroxy-1,7-naphthyridin-8(7H)-one-6-carboxamides 2 were synthesized. N-Lactam unsubstituted compounds 1a-c and 2a,b were obtained by alkoxide-induced rearrangement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31df6338ba7e3ad1fbf509d1ef97de9d
https://doi.org/10.1002/jhet.5570420404
https://doi.org/10.1002/jhet.5570420404
Publikováno v:
Journal of Heterocyclic Chemistry. 39:341-346
The 13C-NMR spectra of some 1,6-naphthyridines 2 and 1,7-naphthyridines 3, as well as those of N-methyl derivatives 4 and 5, were recorded and analyzed. Results in dimethyl-d6 sulfoxide and deuteriochlo-roform provide useful data on intra and intermo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27d2ddd3430dc81f6e66759eb16ecc46
https://doi.org/10.1002/jhet.5570390216
https://doi.org/10.1002/jhet.5570390216
Publikováno v:
Journal of Heterocyclic Chemistry. 36:979-984
A number of 8-hydroxy-6-methyl-1,6-naphthyridin-5(6H)-one-7-carboxylic acid alkyl esters 3 and the isomeric 5-hydroxy-7-methyl-1,7-naphthyridin-8(7H)-one-6-carboxylic acid alkyl esters 4 were synthesized from acyclic precursors obtained starting from
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83876464c6d34e0e8f564725daaec0e1
https://doi.org/10.1002/jhet.5570360425
https://doi.org/10.1002/jhet.5570360425
Autor:
María Cristina Dominga Acevedo, Monica Dal Maso, Susana Gorzalczany, Isabel A. Perillo, Susana M. Sicardi, Celia B. Schapira
Publikováno v:
Journal of Heterocyclic Chemistry. 36:803-811
A series of 4-hydroxy-2H-1,2-benzothiazme-3-carboxamide 1,1-dioxides substituted on the sulfonamide nitrogen with ethoxycarbonylalkyl, cyanoalkyl and dialkylaminoalkyl groups was synthesized. Spectroscopic properties of the obtained products were ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::286cdb8b438daf487e46ca512c1bdea0
https://doi.org/10.1002/jhet.5570360338
https://doi.org/10.1002/jhet.5570360338
Publikováno v:
Journal of Heterocyclic Chemistry. 33:361-366
The reaction of N-substituted quinolinimides 1a-d with sodium alkoxides afforded a mixture of 1,6-naphthyridines 2 and 1,7-naphthyridines 3 which were isolated by chromatographic methods. Structure assignment for each pair of isomers was made by comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a49073fd4862d3155235b72c6d085ccd
https://doi.org/10.1002/jhet.5570330226
https://doi.org/10.1002/jhet.5570330226
Publikováno v:
Journal of Heterocyclic Chemistry. 32:145-154
The reactions of saccharin derivatives 1 with sodium alkoxides were studied. Under mild conditions, compounds 1a-f gave the corresponding open sulfonamides 5a-f. Under drastic conditions, β-(saccharin-2)propionic acid derivatives 1a,b reacted with s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::385bf6a497810a2efee2eccecad5e0dc
https://doi.org/10.1002/jhet.5570320124
https://doi.org/10.1002/jhet.5570320124
Autor:
Isabel A. Perillo, Celia B. Schapira
Publikováno v:
Spectroscopy Letters. 27:587-594
An intermediate compound, most likely enolic (A), was detected by 13 C-NMR spectroscopy during decarboxylation of 4-hydroxy-2H-1,2-benzothiazine-3-carboxylic acid 1,1-dioxide (I)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c64bd0f2f0c92fce678e1f4219abaf7c
https://doi.org/10.1080/00387019408007262
https://doi.org/10.1080/00387019408007262
Publikováno v:
Spectroscopy Letters. 27:387-395
Electron impact mass spectral fragmentation of certain esters and amides derived from 4-hydroxy-2H-1,2-benzothiazine-3-carboxylic acid 1,1-dioxide is described. Common ions to both series may be observed, as well as others allowing them to be differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94ab525717ba22bf8038b17dff85c2e6
https://doi.org/10.1080/00387019408000853
https://doi.org/10.1080/00387019408000853
Autor:
Isabel A. Perillo, Celia B. Schapira
Publikováno v:
Journal of Heterocyclic Chemistry. 30:1051-1056
The 13 C nmr spectra of some 4-hydrody-2H-1,2-benzothiazine 1,1-dioxides I have been recorded and analyzed. Spectroscopic assignments were made on the basis of chemical shift theory, APT and fully coupled 13 C nmr spectra. Spectral data support the e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81372d97619f7b2561ed7f90ae9a458f
https://doi.org/10.1002/jhet.5570300436
https://doi.org/10.1002/jhet.5570300436