RESUMO
Alpha-Hydroxyaryl ketones such as 2-hydroxypropiophenone and 1-(2,4-difluorophenyl)-2-hydroxy-1-propanone, the key intermediates in the preparation of antifungal agents, decompose into oxidized, rearranged, and condensed products. These products were isolated and characterized. The possible mechanisms for the formation of the products are discussed.
Assuntos
Cetonas/química , Antifúngicos/síntese química , Benzeno , Cromatografia em Camada Fina , Estabilidade de Medicamentos , Fluorbenzenos/química , Oxirredução , TriazóisRESUMO
Aminoglycoside antibiotic 66-40G is a minor component produced in the fermentation of Micromonospora inyoensis. Its structure has been established as 3''-de-N-methyl-sisomicin (4) by spectroscopic means and by direct comparison with an authentic sample obtained from photochemical oxidative de-N-methylation of sisomicin (1).
Assuntos
Gentamicinas , Micromonospora/metabolismo , Sisomicina , Aminoglicosídeos/biossíntese , Aminoglicosídeos/isolamento & purificação , Antibacterianos/biossíntese , Antibacterianos/isolamento & purificação , Fenômenos Químicos , Química , Gentamicinas/análogos & derivados , Gentamicinas/biossíntese , Gentamicinas/isolamento & purificação , Sisomicina/análogos & derivados , Sisomicina/biossíntese , Sisomicina/isolamento & purificaçãoRESUMO
Extracts of Heliotropium indicum Linn. (Boraginaceae) showed significant activity in several experimental tumor systems. The active principle is isolated and shown to be the N-oxide of the alkaloid, indicine, previously isolated from this plant. Supporting structural data and anti-tumor data are provided.
