摘要:
A method for preparing streptogramins of the formula (I): ##STR1## wherein R.sub.1 is methyl or ethyl, R.sub.2 is H and X and Y together form an oxo radical, or R.sub.1 is ethyl, R.sub.2 and X are H and Y is H or OH, or else R.sub.1 is ethyl, R.sub.2 is OH and X and Y together form an oxo radical, by demethylation of a synergistin derivative of the formula (II): ##STR2## wherein R.sub.1, R.sub.2, X and Y are as defined above, by means of a treatment with a periodate in an acetic medium, followed by a treatment in an aqueous medium.
摘要:
The invention relates to a novel method for the synthesis of N-{1-[bis(4-chlorophenyl)methyl]azetidin-3-yl}-N-(3,5 -difluorophenyl)methylsulfonamide.
摘要:
The present invention relates to mixtures of polysaccharides derived from heparin having a mean molecular weight of 1500 to 3000 Daltons and an anti-Xa/anti-IIa ratio greater than 30, their method of preparation and pharmaceutical compositions containing them.
摘要:
The invention relates to a novel method for the synthesis of N-{1-[bis(4-chlorophenyl)methyl]azetidin-3-yl}-N-(3,5-difluorophenyl)methylsulfonamide.