One-Pot Synthesis of Trifluoromethylated Iodoisoxazoles via the Reaction of Trifluoroacetohydroximoyl Chloride with Terminal Alkynes and N-Iodosuccinimide
Trifluoromethylated iodoisoxazoles have been synthesized by the reaction of trifluoroacetohydroximoyl chloride, alkynes, and N-iodosuccinimide in a one-pot reaction under metal-free and mild conditions. An array of iodoisoxazole compounds with a wide range of functionalities was obtained in moderate to good yields. The iodine-substituted isoxazoles render versatile reaction sites for subsequent conversion
Regioselective synthesis of isoxazole and 1,2,4-oxadiazole-derived phosphonates <i>via</i> [3 + 2] cycloaddition
作者:Bohdan A. Chalyk、Alona S. Sosedko、Dmitriy M. Volochnyuk、Andrey A. Tolmachev、Konstantin S. Gavrilenko、Oleksandr S. Liashuk、Oleksandr O. Grygorenko
DOI:10.1039/c8ob02257g
日期:——
results of the study on reactions of halogenoximes bearing (protected) functional groups or fluorinated substituents with various phosphorus-containing dipolarophiles are described. To control the regioselectivity of the reaction, vinylphosphonates bearing a leaving group (i.e. bromine or dialkylamino group) in the α or β position were used; 3,5- and 3,4-disubstituted isoxazoles were obtained in 47–80%
Ligands for Brain Cholinergic Channel Receptors: Synthesis and in Vitro Characterization of Novel Isoxazoles and Isothiazoles as Bioisosteric Replacements for the Pyridine Ring in Nicotine
作者:David S. Garvey、James T. Wasicak、Richard L. Elliott、Suzanne Lebold、Ann-Marie Hettinger、George M. Carrera、Nan-Horng Lin、Yun He、Mark W. Holladay
DOI:10.1021/jm00052a005
日期:1994.12
(S)-nicotine (2a) in a preparation of whole rat brain. However, in a paradigm measuring the evoked release of [3H]dopamine from a preparation of rat striatum, there were differences in the agonist potencies and efficacies of these analogues relative to 2a. The differences in agonist potency observed between compounds of comparable binding potency may be due to differences in ligand interactions with various