摘要:
The invention relates to a new economical and simple process, using a new intermediate compound, for the production of 3'-substituted 7-amino-3-propenyl-4-cephem-carboxylic acid derivatives of formula ##STR1## wherein R is hydrogen, a negative charge or a silyl protecting group, R.sub.o is hydrogen or methoxy, R.sub.1 is hydrogen or a silyl protecting group and X is the radical of a nucleophile, and their acid addition salts.
摘要:
Cephalosporin derivatives of formula II ##STR1## wherein R.sup.a denotes hydrogen or a silyl group; R.sup.b denotes a group of formula --OR.sup.e, wherein R.sup.e denotes hydrogen or alkyl; and R.sup.c and R.sup.d together denote a bond; in free form or in salt form.
摘要:
Cephalosporin derivatives of formula ##STR1## wherein R.sub.1 signifies hydrogen or a silyl protecting group, processes for their production and their use as intermediate products.
摘要:
A process for the production of a compound of formula ##STR1## wherein R.sup.a denotes hydrogen or silyl;R.sup.b denotes a group of formula --OR.sup.e, whereinR.sup.e denotes hydrogen or alkyl; andR.sup.c and R.sup.d together denote a bond;in free form or in salt form,which process comprises the step of spitting, in the presence of ozone, the double bond in position 3 of the ring structure of a compound of formula III ##STR2## wherein R.sub.2 and R.sub.3 are the same or different and independently of each other denote hydrogen or an organic group, and X.sup.- denotes the anion of an inorganic or organic acid and optionally silylating the amine group in position 7 of the ring system.
摘要:
The invention relates to a new economical and simple process, using a new intermediate compound, for the production of 3′-substituted 7-amino-3-propenyl-4-cephem-carboxylic acid derivatives of formula wherein R is hydrogen, a negative charge or a silyl protecting group, Ro is hydrogen or methoxy, R1 is hydrogen or a silyl protecting group and X is the radical of a nucleophile, and their acid addition salts.
摘要:
3-Imino-cephalosporin derivatives of formula II ##STR1## wherein Y denotes alkyl, aryl or heterocyclyl; and R.sup.a and R.sup.d denote hydrogen or a silyl group; in free form or in salt form, and methods of preparation.
摘要翻译:式II的3-亚氨基 - 头孢菌素衍生物,其中Y表示烷基,芳基或杂环基; R a和R d表示氢或甲硅烷基; 以游离形式或盐形式,以及制备方法。
摘要:
The invention relates to a new economical and simple process, using a new intermediate compound, for the production of 3'-substituted 7-amino-3-propenyl-4-cephem-carboxylic acid derivatives of formula ##STR1## wherein R is hydrogen, a negative charge or a silyl protecting group, R.sub.o is hydrogen or methoxy, R.sub.1 is hydrogen or a silyl protecting group and X is the radical of a nucleophile, and their acid addition salts.
摘要:
Novel polymorph form III of Aprepitant and a method for preparation of novel form III is disclosed. New processes for the preparation of Aprepitant form II are disclosed. The processes involve transformation of form III to form II by heating in decalin and the precipitation of form II from a solvent or solvent mixture by cooling and/or addition of addition of seed crystals or an anti solvent. Solid dispersions containing Aprepitant form II in a suitable carrier are disclosed. A process for the preparation of the solid dispersion by evaporation of a solution of Aprepitant and the carrier in a suitable solvent is disclosed. Stable Aprepitant form II is disclosed. Further pharmaceutical compositions containing Aprepitant form II, III or solid dispersions containing Aprepitant form II in a suitable carrier are disclosed. A methanol solvate of Aprepitant is disclosed.