摘要:
The present invention relates to a process for the preparation of a compound of the formula I, which comprises reacting a compound of the formula IV with an oxalic acid diester and to novel intermediate compounds used therein.
摘要:
The present invention relates to a process for the preparation of a compound of the formula I, which comprises reacting a compound of the formula IV with an oxalic acid diester and to novel intermediate compounds used therein.
摘要:
The present invention relates to a process for making 6-substituted-1-(2H)-isoquinolinone derivatives of formula (I) wherein R1 and n are as described in the specification. The present invention further relates to novel intermediates which are used in the process according to the invention and to processes for preparing such intermediates.
摘要:
A process for preparing pyrazole-glycoside derivatives of the general Formula (I) in which the meanings are R1 H and R2 F; or R1 F and R2 H; or R1 F and R2 F; R3 (C1-C8)-alkyl, where one, more than one or all hydrogen(s) may be replaced by fluorine; X (C1-C3)-alkylene, (C2-C3)-alkenylene.
摘要:
A process for the production of 2-alkyl-3-aroyl-5-nitrobenzofurans by acylation of 2-(2-hydroxy-5-nitrophenyl)-1-aryl-ethanones and subsequent treatment of the esters with combinations of bases and proton acids or Lewis acids. This process can be used for the production of Dronedarone. Furthermore, novel intermediates for the manufacture of Dronedarone are provided.
摘要:
A process for the production of Dronedarone intermediates of the formula (I), by acylation of 2-(2-hydroxy-5-nitrophenyl)-1-(4-methoxyphenyl)-ethanone, subsequent treatment of the ester with bases and a zeolite (alumosilicate) catalyst and optional subsequent demethylation. This process can be used for the production of Dronedarone.
摘要:
This application relates to a process for the production of (2R)-dihydroartemisinic acid or (2R)-dihydroartemisinic acid esters from artemisinic acid or artemisinic acid esters, respectively, by diimine hydrogenation of the exocyclic CC-double bond, and use of said process in the production of the antimalarial drug artemisinin.
摘要:
A process for the production of 2-alkyl-3-aroyl-5-nitrobenzofurans by acylation of 2-(2-hydroxy-5-nitrophenyl)-1-aryl-ethanones and subsequent treatment of the esters with combinations of bases and proton acids or Lewis acids. This process can be used for the production of Dronedarone. Furthermore, novel intermediates for the manufacture of Dronedarone are provided.
摘要:
A process for the production of Dronedarone intermediates of the formula (I), by acylation of 2-(2-hydroxy-5-nitrophenyl)-1-(4-methoxyphenyl)-ethanone, subsequent treatment of the ester with bases and a zeolite (alumosilicate) catalyst and optional subsequent demethylation. This process can be used for the production of Dronedarone.
摘要:
The present invention is aimed at a process for the preparation of enantiomerically enriched compounds of general formula (I). These are obtained by classical resolution of the corresponding acid using a chiral amino base in organic solvents.