Zobrazeno 1 - 10
of 24
pro vyhledávání: '"F. Geerts-Evrard"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:199-213
– N.M.R. spectra of aldehydes, methylketones and esters of phenanthrene, substituted in positions 2, 3 and 9, have been recorded at 60 Mc. In the nine cases examined in this work, it is possible to determine the position of substitution, without am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a678984d77017ea44d554fd04c999bab
https://doi.org/10.1002/bscb.19640730307
https://doi.org/10.1002/bscb.19640730307
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:189-198
N.M.R. spectra of a few mono and disubstituted derivatives of dibenzo [g,p] chrysene have been recorded at 60 Mc. The N.M.R. data proved decisive in solving an ambiguity which resulted from chemical degradations and thus in localizing the positions o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::333cb0d237e9aa93417d87f38fab9bb9
https://doi.org/10.1002/bscb.19640730306
https://doi.org/10.1002/bscb.19640730306
Autor:
B. Ben Hassine, Ricardo Martin, Jacques Pecher, F. Geerts-Evrard, D. Castelet, Mohamed Gorsane
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 95:547-556
Atrolactic syntheses have been carried out to evaluate the potentiality, in asymmetric syntheses, of chiral inducers. The (dl)-hydroxyhelicenes 1, 2, the (dl) sec. alcohols 3–12 and the (dl) phenolic binaphtyl compound 15 have been used as inducers
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc7961e711de8aac41400b04a54c0187
https://doi.org/10.1002/bscb.19860950705
https://doi.org/10.1002/bscb.19860950705
Publikováno v:
Tetrahedron. 43:4329-4338
Contrary to what is observed with other π-deficient heteroaromatic N-oxides, the reaction of 2, 3-diphenylquinoxaline-N1-oxide with OPCl3 gives only very poor yields of chlorinated quinoxalines. It is shown that the major product arises from an unpr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b062942f86be31763491366e21d14e1f
https://doi.org/10.1016/s0040-4020(01)90308-4
https://doi.org/10.1016/s0040-4020(01)90308-4
Publikováno v:
Tetrahedron. 22:181-201
Zusammenfassung Les spectres RMN de 26 derives aza-aromatiques polycondenses, releves dans CDCl 3 et C 6 D 6 , ont ete compares aux spectres des hydrocarbures correspondants, releves dans les memes solvants. Cette etude comparative a permis (a) de pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fd38d87d61ad25ab68e5119fc2645a4
https://doi.org/10.1016/s0040-4020(01)82183-9
https://doi.org/10.1016/s0040-4020(01)82183-9
Publikováno v:
Tetrahedron. 20:1505-1518
From the study of a large number of monosubstituted benzo[c]phenanthrene derivatives, the following conclusions can be drawn: 1. When R OCH 3 , NHCOCH 3 or NH 2 , the position of substitution can be specified by first order analysis of the NMR sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::182ae3f15f9f7ddca2a0c7c5e8a3683c
https://doi.org/10.1016/s0040-4020(01)99145-8
https://doi.org/10.1016/s0040-4020(01)99145-8
Autor:
R.H. Martin, F. Geerts-Evrard
Publikováno v:
Tetrahedron. 22:287-294
Resume Dix quinoleines polycondensees, dont quatre nouvelles (VIII, IX, X et XI), et trois methyl-quinoleines, dont deux nouvelles (IVa et VIa), ont ete obtenues par des reactions d Skraup et de Doebner-von Miller modifiees, au depart d'acetamides po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22381ad00025138f40700f3dcb4a9912
https://doi.org/10.1016/s0040-4020(01)99116-1
https://doi.org/10.1016/s0040-4020(01)99116-1
Publikováno v:
Tetrahedron. 21:1833-1845
Ortho and peri effects due to cyclic heteroatoms and (thio)carbonyl functions have been compared in the (1-thio)chromone and (thio)xanthen-9-one series. As a result of this work, the 7H-benzo[c]thioxanthen-7-one structure XVI has been assigned to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a101b890c9ebeb00bb02981e17025d14
https://doi.org/10.1016/s0040-4020(01)98654-5
https://doi.org/10.1016/s0040-4020(01)98654-5
Publikováno v:
Tetrahedron. 20:1091-1104
Resume Le triphenylene a ete choisi, en tant que systeme particulierement favorable, pour l'etude preliminaire des effets de blindage et de deblindage induits par differents types de substituants, en serie polycyclique aromatique. Les resultats obten
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::067df7bcfaaba3922528b68eb1a4d744
https://doi.org/10.1016/s0040-4020(01)98446-7
https://doi.org/10.1016/s0040-4020(01)98446-7
Publikováno v:
Tetrahedron. 20:1073-1090
Resume Les spectres de 20 hydrocarbures alternants non substitues, dont deux systemes cycliques nouveaux(XIX et XX), ont ete releves a 60 Mc. Les deplacements chimiques et la largeur des differents massifs de bandes ainsi que les ecarts entre ces mas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::658ebf07152542c6056a6ef9f27c123b
https://doi.org/10.1016/s0040-4020(01)98445-5
https://doi.org/10.1016/s0040-4020(01)98445-5