摘要:
A Streptogramine derivative of formula (I) is disclosed, wherein the symbol Y is a hydrogen atom, a methyl amino or dimethylamino radical, or a protected methylamino radical, and the symbol R represents a methyl or ethyl radical. ##STR1##
摘要:
Compounds are provided corresponding to the following general formula (I): in which:--R.sub.1 and R.sub.2, independently of each other, represent an alkyl group with 1 to 3 carbon atoms, or a group of formula --CH.sub.2 --OR.sub.a, R.sub.a representing a hydrogen atom or a methyl group R.sub.x represents: an alkyl group with 1 to 3 carbon atoms, in particular a methyl group, or an --OR.sub.x1 group, R.sub.x1 representing an alkyl group with 1 to 3 carbon atoms, in particular a methoxy group, or a group of formula --CH.sub.2 --X in which X represents a halogen atom, in particular chlorine, or a group of formula (a) ##STR1## in which: R.sub.3 and R.sub.5, independently of each other, represent a hydrogen atom, or an --OH group, or an --OCH.sub.3 group, R.sub.4 represents a hydrogen atom, or an --OR.sub.b group, R.sub.b representing a hydrogen atom or a methyl group, or R.sub.4 represents a group of formula --Or.sub.c, R.sub.c representing a group of formula --CH.sub.2 --CO--C.sub.6 H.sub.4 R'. The present compounds are benzoxazine derivatives which are used for treating pathological conditions associated with the presence of free radicals, such as Alzheimer's disease, and methods are provided for preparation of these compounds.