摘要:
Ethyl 3-[(2-{[4-(hexyloxycarbonylaminoiminomethyl)phenylamino]methyl}-1-methyl-1H-benzimidazole-5-carbonyl)pyridin-2-ylamino]propionate methanesulfonate in the crystalline modifications I and II and as the hemihydrate and the use thereof as a pharmaceutical composition.
摘要:
The present invention relates to a shortened process for preparing L-lobeline by rhodium-catalysed asymmetric hydrogenation on an industrial scale.
摘要:
A process for preparing tropenol (I) or an acid addition salt thereof, the process comprising: (a) reducing a scopine ester of formula (II) wherein R is C1-C4-alkyl or C1-C4-alkylene-phenyl, each optionally substituted by hydroxy or C1-C4-alkoxy, or an acid addition salt or hydrate thereof, using zinc in a suitable solvent in the presence of an activating metal salt; and (b) saponifying the product of (a) using a suitable base to obtain the tropenol of formula (I) or the acid addition salt thereof.
摘要:
The present invention relates to a new process for preparing enantiomerically pure diarylprolinols, especially (R)-(+)- or (S)-(-)-2-(diphenylhydroxymethyl)-pyrrolidine (R)-(+)- or (S)-(-)-.alpha.,.alpha.-diphenyl-(2-pyrrolidinyl)-methanol) starting from proline.
摘要:
The invention relates to a process for preparing the compound of formula 1, a valuable intermediate product in the synthesis of the pharmaceutical active substance dabigatran etexilate.
摘要:
The invention relates to a process for preparing the compound of formula 1, a valuable intermediate product in the synthesis of the pharmaceutical active substance dabigatran etexilate.
摘要:
The present invention relates to a shortened process for preparing L-lobeline by rhodium-catalysed asymmetric hydrogenation on an industrial scale.
摘要:
A process for purifying 20(S)-camptothecin, the process comprising: (a) combining an aqueous base and a starting material containing 20(S)-camptothecin to convert the lactone ring of the 20(S)-camptothecin into a carboxylate salt; (b) hydrogenating to the product of step (a) in the presence of a transition metal catalyst; (c) acidifying the aqueous phase of the product of step (b) to form 20(S)-camptothecin crystals; (d) adding at least one polar aprotic solvent to the product of step (c); and (e) separating off the purified 20(S)-camptothecin crystals.
摘要:
A method of preparing sugar acetonides, such as for example 1,2:5,6-Di-O-isopropylidene-.alpha.-D-glucofuranose, by reacting the corresponding sugar, e.g. D-(+)-glucose, with acetone in the presence of a Lewis acid and a carboxylic acid derivative of general formula ##STR1## wherein X is a leaving group which may be readily replaced by a hydroxyl group.
摘要翻译:通过使相应的糖例如1,2-二氧杂环己烷-β-D-吡喃葡萄糖反应制备糖类丙烯酸酯,例如1,2:5,6-二-O-异亚丙基-α-D-呋喃葡萄糖的方法。 D - (+) - 葡萄糖与丙酮在路易斯酸和通式为“IMAGE”的羧酸衍生物存在下反应,其中X是可以容易地被羟基取代的离去基团。