摘要:
The present invention is related to an improved industrially applicable process for preparing pimecrolimus from ascomycin. This process shows significantly high yields, so that purification of the pimecrolimus can be accomplished by crystallization, not requiring for example of chromatographic purifications.
摘要:
The invention provides an improved process for the preparation of a benzonaphthalene derivative including, in particular, the manufacture of high purity adapalene. The invention further includes a method for assessing the color of adapalene by means of a quantitative colorimetric measurement of the produced adapalene.
摘要:
The invention provides an improved process for the preparation of a benzonaphthalene derivative including, in particular, the manufacture of high purity adapalene. The invention further includes a method for assessing the color of adapalene by means of a quantitative colorimetric measurement of the produced adapalene.
摘要:
A process for preparing substituted pyrrolidine compounds, including (5)-2-{l-[2- (2,3-dihydrobenzofuran-5-yl)ethyl]-3-pyrrolidinyl}-2,2-diphenylacetamide hydrobromide, commonly known in the art as darifenacin, comprising reacting a pyrrolidine compound with a benzofuran derivative in the presence of a phase-transfer catalyst.
摘要:
The present invention concerns a process for the preparation of 5-(2-(4-(1,2- 5 benzisothiazol-3-yl)-1-piperazinyl)ethyl)-6-chloro-1,3-dihydro-2H-indol-2-one of the formula (I), or a pharmaceutically acceptable acid addition salt, solvate, hydrates or clathrate thereof, said process comprising reacting a compound of formula (II) wherein X is a halogen atom, with a compound of formula (III), said compound of formula (III) being the free base or an addition salt with an organic or inorganic acid, wherein said process is characterized in that said compounds according to formulas (II) and (III) are reacted in the presence of a neutralizing agent, and are reacted in a solvent comprising acetonitrile.