Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Raimonds Valters"'
Autor:
Neilande, Maija, Veldruma, Ilze
Latvijas Zinātņu akadēmijas akadēmiķa, Rīgas Tehniskās universitātes profesora R. Valtera biobibliogrāfija aptver laika posmu no 1959. gada līdz 2008. gada martam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=od______2360::92293bf88189948d004bb592e574a923
https://dspace.lu.lv/dspace/handle/7/52815
https://dspace.lu.lv/dspace/handle/7/52815
Akademický článek
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Publikováno v:
Tetrahedron Letters. 57:292-295
An efficient method for the synthesis of 8-hydroxypyrido[1,2-a]benzimidazole-6,9-dione derivatives is described. This approach provides convenient access to hydroxypyrido[1,2-a]benzimidazole-6,9-dione analogs bearing electron withdrawing or electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3cb96d5ce999430e4922a6cf0cd7bff
https://doi.org/10.1016/j.tetlet.2015.12.002
https://doi.org/10.1016/j.tetlet.2015.12.002
Publikováno v:
Chemistry of Heterocyclic Compounds. 48:888-891
Aminovinyl derivatives of quinoline-5,8-dione and isoquinoline-5,8-dione were obtained. The structure of (E)-6-chloro-7-[2-(N,N-diethylamino)vinyl]quinoline-5,8-dione was confirmed by X-ray structural analysis.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03f8a59f4b5d3b5c5ef0f60e5b4eca86
https://doi.org/10.1007/s10593-012-1071-6
https://doi.org/10.1007/s10593-012-1071-6
Publikováno v:
Journal of fluorescence. 26(1)
This communication concerns the synthesis, structural characterization and fluorescent properties of novel naphtho[2,3-b]indolizine-6,11-dione derivatives. The target compound synthesized by one-pot multicomponent reaction between naphthoquinone, ind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6edc1568d4dd230f0f0ee464d971b636
https://pubmed.ncbi.nlm.nih.gov/26482522
https://pubmed.ncbi.nlm.nih.gov/26482522
Publikováno v:
Chemistry of Heterocyclic Compounds. 41:691-717
Methods for the synthesis of heteroaryl-substituted 1,4-benzo- and 1,4-naphthoquinones with a C-C bond between the heterocycle and quinone fragments are reviewed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a41bf947d873ebfa94b18e9ea886e992
https://doi.org/10.1007/s10593-005-0210-8
https://doi.org/10.1007/s10593-005-0210-8
Publikováno v:
Tetrahedron Letters. 54:4697-4699
Novel 6,7-dichloropyrido[1,2- a ]benzimidazole-8,9-dione derivatives and its analogues were synthesized directly from chloranil and different 2-amino(di)azines without using a catalyst or activation. Further nucleophilic substitution reactions were c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfa38b05de67b0824ccf9ff53c8405c7
https://doi.org/10.1016/j.tetlet.2013.06.094
https://doi.org/10.1016/j.tetlet.2013.06.094
Autor:
G. Karlivans, Raimonds Valters
Publikováno v:
Chemistry of Heterocyclic Compounds. 40:807-810
When 4,6,7-trichloro-5-hydroxy-2-(2-pyrimidylamino)- 2,3-dihydrobenzo[b]furan reacted with phenyliodoso diacetate, an unexpected oxidative recyclization was observed to give 3-(3,5,6-trichloro-1,4-benzoquinon-2-yl)imidazo[1,2-a]pyrimidine. 2-[N-2-(3,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::526e91f452f6257671b5684464058584
https://doi.org/10.1023/b:cohc.0000040780.74690.35
https://doi.org/10.1023/b:cohc.0000040780.74690.35
Publikováno v:
Chemistry of Heterocyclic Compounds. 48:1571-1573
Reaction of compound (I) with acetaldehyde and diethylamine gives the unexpected product (III) whose structure is confirmed by an X-ray structure analysis.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00cb26c34442fc8521f951dba0c5a30a
https://doi.org/10.1007/s10593-013-1177-5
https://doi.org/10.1007/s10593-013-1177-5
Autor:
Raimonds Valters, G. Karlivans
Publikováno v:
Chemistry of Heterocyclic Compounds. 39:1617-1622
4,6,7-Trichloro-2-hetarylamino-5-hydroxy-2,3-dihydrobenzo[b]furans have been prepared from 4,6,7-trichloro-2,5-dihydroxy-2,3-dihydrobenzo[b]furan and hetarylamines. Reductive opening of the dihydrobenzofuran ring in these compounds gave 3,5,6-trichlo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a54d19edae8e020dd3e1cba53861da8c
https://doi.org/10.1023/b:cohc.0000018339.22815.13
https://doi.org/10.1023/b:cohc.0000018339.22815.13