Zobrazeno 1 - 10
of 77
pro vyhledávání: '"D. Vigner"'
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 52:207-210
For the title compounds, C24H29NO (I) and C22H22F3NO (II), the cyclohexane ring adopts a chair conformation. Both compounds exhibit a cis ring-fused exo configuration. When the N atom bears a phenyl ring and the C(2) atom is substituted by a 2,4,6-tr
Publikováno v:
Tetrahedron. 50:8445-8456
Lewis acid catalyzed cyclization of lactones 1 – 4 or cyclohexanone 5 bearing trans vicinal aroyl and allylic moieties provided stereoselecti
Autor:
Marie Claude Roux, Jacqueline Seyden-Penne, L. Wartski, D. Vigner, Monique Lance, Gary H. Posner, Martine Nierlich
Publikováno v:
The Journal of Organic Chemistry. 58:3969-3973
The reaction of (N,N-dimethylamino)phenylacetonitrile anion (I) as a one-carbon atom Michael donor toward α,β-unsaturated lactones and ketones followed by allylation of the intermediate enolates provided in a one-pot procedure trans α-monoallylate
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 49:16-19
UO2(NO3)2(H20)2).2C14H2oOs, Mr = 966.69, monoclinic, P21/n, a = 10.891 (3), b = 8.312(2), c= 20.507 (6) /~, fl=97.21(2) °, V= 1842 (1)/~3, Z = 2, Dx = 1.74 g cm -3, a(Mo Ka) = 0.71073 A_, /x = 42.56 cm- ~, F(000) = 956, T = 295 K, R = 0.024 for 1994
Autor:
Martine Nierlich, L. Wartski, G. H. Posner, Marie‐Claude Roux, Jacqueline Seyden-Penne, D. Vigner, Monique Lance
Publikováno v:
ChemInform. 24
Publikováno v:
ChemInform. 25
Lewis acid catalyzed cyclization of lactones 1 – 4 or cyclohexanone 5 bearing trans vicinal aroyl and allylic moieties provided stereoselecti
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 47:1842-1845
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 47:173-176
1) C 25 H 33 NO 2 Si cristallise dans P2 1 avec a=6,018, b=8,073, c=24,205 A, β=92,07 o , Z=2; affinement jusqu'a R=0,080; 2) C 25 H 33 NO 2 Si cristallise dans P1 avec a=9,106, b=10,541, c=13,210 A, α=79,20, β=73,04, γ=88,06 o , Z=2; affinement
Autor:
D. Vigner, Martine Nierlich, C. de Rango, Pierrette Charpin, G. Folcher, A. Navaza, Monique Lance
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 46:1778-1781
4[U(CF 3 COO) 4 (H 2 O) 0,5 ]•2C 18 H 36 N 2 O 6 cristallise dans P1 avec a=13,003, b=13,338, c=16,738 A, α=84,36, β=68,71, γ=87,19°, Z=1, affinement jusqu'a R=0,038. Les quatre atomes U sont relies par des coordinats trifluoracetate et des mol
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 50:131-133
The X-ray analysis confirms the trans relationship between the C(2) and C(3) substituents of the cyclopentanone ring and allows us to determine the relative configuration: 2S, 3R, 9S or 2R, 3S, 9R. Moreover, it indicates the half-chair conformation o