Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Djaballah Belkacemi"'
Publikováno v:
ARKIVOC, Vol 2002, Iss 6, Pp 164-174 (2002)
Externí odkaz:
https://doaj.org/article/d6cc6431a9e8416ca6894616c67234b6
Autor:
Ahmed A. Ahmed, Kalla Ali, Djaballah Belkacemi, Mohamed-Elamir F. Hegazy, Messai Laid, Shinji Ohta
Publikováno v:
Phytochemistry Letters. 1:85-88
The phytochemical investigation of the methylene chloride/methanol extract of the aerial parts of Artemisia herba-alba afforded two new natural sesquiterpene lactones 1β,9β-diacetoxyeudesm-3-en-5α,6β,11β H -12,6-olide ( 1 ) and 1β,9β-diacetoxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e8f8e3c48fe22368577346bf8c57cd1
https://doi.org/10.1016/j.phytol.2008.04.002
https://doi.org/10.1016/j.phytol.2008.04.002
Publikováno v:
ARKIVOC, Vol 2002, Iss 6, Pp 164-174 (2002)
Addition of phenyl azide to selected derivatives of the 2-azabicyclo(2.2.1)hept-5-ene, 2- azabicyclo(2.2.1)hept-5-en-3-one and 2-azabicyclo(2.2.2)oct-5-en-3-one ring systems is described. Modest levels of regioselectivity are observed; 100% exo-facia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dfa8cb45cdedc70c731fa4be0939ffbc
https://doi.org/10.3998/ark.5550190.0003.615
https://doi.org/10.3998/ark.5550190.0003.615
Publikováno v:
Tetrahedron. 58:197-204
Only two of the four possible facial approaches of cyclohexa-1,3-diene to the double bond in 2-methyl-5,6-benzo-2-azabicyclo[2.2.2]oct-7-en-3-one 7 are observed, giving exo,endo- and endo,endo-Diels–Alder cycloadducts 10a and 11a at atmospheric pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47134bc3c968a0374f23680e3b9673b7
https://doi.org/10.1016/s0040-4020(01)01125-5
https://doi.org/10.1016/s0040-4020(01)01125-5
Autor:
Djaballah Belkacemi, John R. Malpass
Publikováno v:
Tetrahedron. 49:9105-9116
The title compounds were studied by 1 H, 13 C, and 15 N NMR spectroscopy. Since inversion at nitrogen is rapid on the NMR time scale even at low temperatures, kinetic protonation was used to estimate invertomer ratios at ambient temperature. Invertom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b156cb7f0c9eeb4b6632b6f104eca794
https://doi.org/10.1016/s0040-4020(01)91227-x
https://doi.org/10.1016/s0040-4020(01)91227-x
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91a3ace8b97290ae9c2cc471a99d0439
https://doi.org/10.1002/chin.199221079
https://doi.org/10.1002/chin.199221079
Publikováno v:
ChemInform. 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bdf7c4a98079c646f41ec0a05a0358d
https://doi.org/10.1002/chin.199311057
https://doi.org/10.1002/chin.199311057
Autor:
Djaballah Belkacemi, John R. Malpass
Publikováno v:
ChemInform. 25
The title compounds were studied by 1 H, 13 C, and 15 N NMR spectroscopy. Since inversion at nitrogen is rapid on the NMR time scale even at low temperatures, kinetic protonation was used to estimate invertomer ratios at ambient temperature. Invertom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f9c62f8cddd3443e1707157acc106ab
https://doi.org/10.1002/chin.199404031
https://doi.org/10.1002/chin.199404031
Publikováno v:
Tetrahedron. 48:861-884
The synthesis of a range of N-alkyl 1,4-dihydro-1,4-iminonaphthalenes (7-azabenzonorbornadienes) and reduced derivatives is described together with 1,4-dihydro-1,4- and 9,10-dihydro-9,10- iminoanthracenes. VT NMR studies lead to unambiguous assignmen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af4a510cad331b97784882eea01656ab
https://doi.org/10.1016/s0040-4020(01)88190-4
https://doi.org/10.1016/s0040-4020(01)88190-4