Friedel–Crafts reactions of acyl trifluoromethanesulfonates and cyclic acylsulfonium cations generated from acyl fluorides
作者:K.V. Raghavendra Rao、Yannick Vallée
DOI:10.1016/j.tet.2016.06.029
日期:2016.7
Reactive acyl trifluoromethanesulfonates are formed from the reaction of acyl fluorides with trimethylsilyl trifluoromethanesulfonate (TMSOTf). These electrophiles undergo Friedel–Crafts reactions with electron-rich aromatics at room temperature. When a sulfur atom is present at their γ position, their cyclization to acylsulfonium cations is observed and is followed by a rearrangement leading to benzothiepinones
Studies on the Synthesis of Condensed Pyridazine Derivatives. IV. Synthesis and Anxiolytic Activity of 2-Aryl-5,6-dihydro-(1)benzothiepino(5,4-c)pyridazin-3(2H)-ones and Related Compound.
A series of 2-aryl-5,6-dihydro-(1)benzothiepino[5,4-c]pyridazin-3(2H)- ones and relatedcompounds were synthesized and evaluated for their ability to displace 3H-diazepam from rat brain membranes in vitro, and to prevent bicuculline induced convulsions in mice in vivo. Compounds with a 4'-methoxyphenyl (36) or 4'-chlorophenyl group (37, 39--42) as 2-aryl substituents showed prominent activities in
<i>v</i>-triazolines. Part XVI. Synthesis of benzothiepino[4,5-<i>d</i>]-<i>v</i>-triazole derivatives
作者:Luisa Maria Rossi、Pasqualina Trimarco
DOI:10.1002/jhet.5570170738
日期:1980.11
The cycloaddition reaction of some arylazides to enamines 4a-f afforded v-triazolines 5a-i; by subsequent acid-catalyzed hydrolysis v-triazoles 6a-c were obtained. The reversibility of the cycloaddition was demonstrated on the basis of spectroscopic or chemical evidences.
Chemistry of Seven-Membered Heterocycles, VI. Synthesis of Novel Bicyclic Heterocyclic Compounds as Potential Anticancer and Anti-HIV Agents
作者:Abou Elfatooh G. Hammam、Nagla A. Abd El-hafeza、Wanda H. Midurab、Marian Mikołajczyk
DOI:10.1515/znb-2000-0511
日期:2000.5.1
arylmethylenecyanoacetamide. The synthesis of the fused-ring pyranes 8 and 9 involved the condensation of the ketones 4 and 5 with malononitrile under basic conditions. The rearrangement of 8 under acidic conditions gave the tetrahydropyridine 10. The pyran 20 was obtained from 15 and benzaldehyde. The screening tests showed that many of the compounds obtained exhibit good anticancer activity comparable to