Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Marie-Louise Roumestant"'
Synthèse et réactivité des dérivés de la 2,3-dihydro-3-hydroxy-2-phényl-1,5-benzothiazépin-4(5H)-one
Autor:
El Mokhtar Essassi, Hamza El Meslouhi, Moussa Salem, Abdelfettah Zerzouf, Philippe Viallefont, Marie-Louise Roumestant
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry. 4:925-931
New 1,5-benzothiazepinone derivatives have been synthesized. The cycloaddition of benzylazide with 5-propargyl-1,5-benzothiazepinone 7 gave compounds 9 and 10 . The 1,5-benzothiazepinone 8 reacts with hydrazine to give 1,5-benzothiazepinone 11, which
Autor:
Moussa Salem, El Mokhtar Essassi, Marie-Louise Roumestant, Abdelfettah Zerzouf, Philippe Viallefont, Abdoulay Keita
Publikováno v:
Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry. 2:435-439
Resume Le 2-(4-methylphenyl)acyl-l,3-benzothiazole 3b reagit avec le N -bromosuccinimide pour donner le produit de dimerisation 4 . Ce dernier, porte au refux du triethylphosphite, se transforme en furane 5. Le 2-phenacyl-1,3-benzothiazole 3a , apres
Publikováno v:
Tetrahedron: Asymmetry. 7:2585-2593
An asymmetric synthesis of cis - and trans - 5-hydroxy-(D)-pipecolic acid, starting from glycinate Schiff bases is described. The approach involves the stereoselective alkylation to generate an unsaturated side chain which on cyclisation leads to the
Publikováno v:
Scopus-Elsevier
Publikováno v:
ChemInform. 28
Publikováno v:
ChemInform. 33
Publikováno v:
European Journal of Organic Chemistry; Feb2004, Vol. 2004 Issue 4, p873-877, 5p
Publikováno v:
Phosphorous and Sulfur and the Related Elements. 36:73-77
An efficient general asymmetric synthesis of α-aminophosphonic acid derivatives has been achieved by alkylation of the Schiff bases 2, prepared from (1R,2R, 5R)(+) or (1S,2S, 5S)(-) 2-hydroxy 3-pinanone 1 and α-aminomethyl phosphonic acid diethyles
Publikováno v:
Tetrahedron Letters. 29:2441-2444
It is shown that the reactivity towards electrophites of diastereomeric Schiff bases of *R and *S valine, leucine, phenylalanine and norvaline methyl esters with (1S,2S,5S) or (lR,2R,5R) 2-hydroxy 3-pinanone, is highly dependent on the stereochemistr
Publikováno v:
Tetrahedron. 44:5319-5332
The reactivity of lithiated chiral Schiff bases 2 with carbonyl compounds is studied. They do not react with ketones but with aldehydes good chemical yields are obtained in the presence of cosolvents. On the other hand, the reaction with unsaturated