Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Fahmy M. Asaad"'
Publikováno v:
Synthesis. 1987:301-304
Publikováno v:
Liebigs Annalen der Chemie. 1985:620-627
An effective synthesis of 3-benzoyl-2(1 H)-pyridinethiones 5a – n from stable enol salts 4 of pentene-1,5-diones and isothiocyanates is described. An attempt to prepare a 3-acetyl-2(1 H)-pyridinethione from the cyano compound 7 and CH3MgX yielded t
Autor:
Jesper Hansen, Flemming Splidsboel Hansen, Jan Becher, Tea Johansen, Fahmy M. Asaad, Sine Larsen
Publikováno v:
Journal of Heterocyclic Chemistry. 23:567-575
Aldol condensation of 3-formyl-2(1H)-pyridinethiones and the corresponding pyridones with ketones such as acetophenones in aqueous base yields 3-hydroxy-1-propanones in high yields. Reaction with propiophenone showed this reaction to be highly diaste
Publikováno v:
Inorganica Chimica Acta. 121:23-26
Multisulfur-containing ligands can conveniently be prepared by nucleophilic substitution of chlorine in various heterocyclic and other aromatic systems by the 2-methyl-2-propylthiolate anion, followed by elimination of isobutene from the resulting t-
Publikováno v:
Liebigs Annalen der Chemie. 1987:495-498
Chlorosulfonyl isocyanate reacts with hydroxynitrostyrenes 1 to give the corresponding N-unsubstituted carbamates 3. The latter undergo transesterification with p-toluenesulfonyl chloride to give the corresponding sulfonates 4. The analogous phosphat
Publikováno v:
Synthesis. 1986:952-956
Publikováno v:
Liebigs Annalen der Chemie. 1988:183-185
5-Chloro-3-formylsalicylic acid (1) is readily obtained by reaction of 5-chlorosalicylic acid with chloroform in alkali. 1 condenses with nitromethane to give 5-chloro-3-(2-nitroethenyl)-salicylic acid (2) which condenses with anilines through its ch
Autor:
Jan Becher, Fahmy M. Asaad
Publikováno v:
Synthesis. 1983:1025-1027
La reaction passe par l'intermediaire d'enolates d'heptanediones-2,6 en milieu anhydre sur lesquels on additionne des isothiocyanates d'aryle
Publikováno v:
Synthesis. 1988:246-248
Publikováno v:
ChemInform. 18