摘要:
Methods of preparing and purifying tetracyclines, such as tigecycline, are disclosed. Also disclosed are tetracycline compositions, such as tigecycline compositions, prepared by these methods.
摘要:
Methods of preparing and purifying tetracyclines, such as tigecycline, are disclosed. Also disclosed are tetracycline compositions, such as tigecycline compositions, prepared by these methods.
摘要:
Methods of preparing and purifying tetracyclines, such as tigecycline, are disclosed. Also disclosed are tetracycline compositions, such as tigecycline compositions, prepared by these methods.
摘要:
Methods of preparing and purifying tetracyclines, such as tigecycline, are disclosed. Also disclosed are tetracycline compositions, such as tigecycline compositions, prepared by these methods.
摘要:
The present invention provides a process for the preparation of 6-amino-4-(3-chloro-4-fluoro-phenylamino)-7-ethoxy-quinoline-3-carbonitrile comprising the steps and products disclosed within this application.
摘要:
The present invention provides a process for the preparation of 6-amino-4-(3-chloro-4-fluoro-phenylamino)-7-ethoxy-quinoline-3-carbonitrile comprising the steps and products disclosed within this application.
摘要:
Methods of preparing and purifying 9-nitrominocycline and 9-aminominocycline and salts thereof used in the process of making tigecycline, are disclosed. In one embodiment, the invention is directed to a method of preparing the compound of formula 1 or a pharmaceutically acceptable salt thereof, comprising: (a) reacting nitric acid with the compound of formula 2, or a salt thereof, to produce a reaction mixture comprising an intermediate; and (b) further reacting the intermediate to form the compound of formula 1, wherein the intermediate is isolated from the reaction mixture, the method further comprising sparging with an inert gas prior to step (a).
摘要:
The invention claimed herein provides a process to oxidize N-(5-alkoxy-2-methyl-4-nitrophenyl)acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.
摘要:
The invention claimed herein provides a process to oxidize N-(5-alkoxy-2-methyl-4-nitrophenyl)acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.
摘要:
The invention claimed herein provides a process to oxidize N-(5-alkoxy-2-methyl-4-nitrophenyl)acetamides to N-acyl-2-amino-4-alkoxy-5-nitrobenzoic acids using potassium permanganate in the presence of magnesium sulfate in aqueous sulfolane or aqueous pyridine.