Bismuth Chloride Mediated Synthesis, Antimicrobial, and Anti-Inflammatory Activities of New 4-Aryl-2-Amino Thiazoles
摘要:
Synthesis of 4-aryl-2-Amino thiazoles (3a-u), (4a-c), and (5a-c) was achieved from the reaction of 4-butyl phenacyl chlorides (2a-c) with N-substituted thioureas, in the presence of Bismuth Chloride. The antimicrobial and anti-inflammatory activities of the final products were also studied.
Media controlled photo-Favorskii type rearrangement of α-chloro acetophenones: Synthesis of phenylacetic acids
作者:Dilip D. Dhavale、Vasant P. Mali、Surendra G. Sudrik、Harikisan R. Sonawane
DOI:10.1016/s0040-4020(97)10081-3
日期:1997.12
Photolysis of substituted α-chloro acetophenones has been studied in different solvent systems wherein 1,2-aryl migration is found to be media controlled. Effect of substituents on the migratory aptitude and a direct access to phenylacetic acids, in practical yields, has been described.
Process for preparing .alpha.-hydroxy-acids and compounds obtained by
申请人:Sanofi
公开号:US04675419A1
公开(公告)日:1987-06-23
The invention relates to a process for preparing .alpha.-hydroxy-acids of general formula: ##STR1## in which R represents hydrogen or a lower alkyl radical and Cy represents a phenyl, naphthyl or heterocyclic radical, these latter three radicals optionally comprising one or more substituents selected from the group consisting of lower alkyl, lower alkenyl, lower alkynyl, lower alkoxy radicals and halogen atoms, process which comprises the treatment of an .alpha.-monohalogenated ketone of general formula: ##STR2## in which R and Cy have the same meaning as above and X represents chlorine, bromine or iodine, in the presence of an aqueous solution of an alkali metal hydroxide, a non-polar organic solvent selected from an aromatic or alicyclic hydrocarbon and oxygen in excess optionally in the presence of an inert gas, the treatment being carried out at a temperature ranging from the boiling temperature of the reaction medium at atmospheric pressure and 240.degree. C. under pressure and the alkali metal so formed is then acidified to obtain the desired acid.