Abstract:
A process for the purification of 1,4-butanediol mononitrate from 1,4-butanediol dinitrate and 1,4-butanediol, by selective extraction with solvents is herein disclosed.
Abstract:
The present invention relates to a new process for the preparation of NO-donating compounds using a sulfonated intermediate. The invention relates to new intermediates prepared therein suitable for large scale manufacturing of NO-donating compounds. The invention further relates to the use of the new intermediates for the manufacturing of pharmaceutically active NO-donating compounds.The invention further relates to a substantially crystalline form of NO-donating NSAIDs, especially 2-[2-(nitrooxy)ethoxy]ethyl {2-[(2,6-dichlorophenyl)amino] phenyl}acetate, the preparation thereof and to pharmaceutical formulations containing said crystalline form and to the use of said crystalline form in the preparation of a medicament.
Abstract:
The present invention refers to a process for preparing a compound of general formula (A), wherein R is a radical of naproxen or bromonaproxen and R1-R12 are hydrogen or alkyl groups, m, n, o, q, r and s are each independently an integer from 0 to 6, and p is 0 or 1, and X is O, S, SO, SO2, NR13 or PR13or an aryl, heteroaryl group, said process comprising reacting a compound of formula (B) : R-COOZ wherein R is as defined above and Z is hydrogen or a cation selected from: Li+, Na+, K+, Ca++, Mg++, tetralkylammonium, tetralkylphosphonium, with a compound of formula (C), as reported in the description, wherein R1-R12 and m, n, o, p, q, r, s are as defined above and Y is a suitable leaving group.
Abstract:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Entfernung von bei der Herstellung von aliphatischen oder cycloaliphatischen Salpetersäureestern anfallenden Verunreinigungen, insbesondere zur Entfernung von Verunreinigungen aus bei der Nitrierung von nitrierbaren ein- oder mehrwertigen aliphatischen oder cycloaliphatischen Alkoholen nach Abtrennung der Nitrierendsäure anfallenden nitrierten Rohsalpetersäureestern, sowie eine Produktionsanlage zur Nitrierung nitrierbarer ein- oder mehrwertiger aliphatischer Alkohole mit nachfolgender Aufreinigung der nitrierten Salpetersäureester.
Abstract:
The present invention relates to a one-step process for the synthesis of nitric acid esters or 15 N isotopically labeled nitrate esters of organic compounds starting from the correspondent alcohols. Formula (I).
Abstract:
Processes for the preparation of naproxcinod and its purification, solid dispersions of naproxcinod with a pharmaceutically acceptable carrier, and processes for making dispersions. Also provided is crystalline 2-(S)-(4-chlorobutyl)-2-(6-methoxy-2-naphthyl)-propanoate and methods for its preparation.