EP 2945961 A1 20151125 - PROCESS FOR PREPARATION OF 3,24;16,22-DI-O,O-ISOPROPYLIDENEPROTOESCIGENIN AND CRYSTALLINE FORMS THEREOF
Title (en)
PROCESS FOR PREPARATION OF 3,24;16,22-DI-O,O-ISOPROPYLIDENEPROTOESCIGENIN AND CRYSTALLINE FORMS THEREOF
Title (de)
VERFAHREN ZUR HERSTELLUNG VON 3,24;16,22-DI-O,O-ISOPROPYLIDENEPROTOESCIGENIN UND KRISTALLINE FORMEN DAVON
Title (fr)
PROCÉDÉ DE PRÉPARATION DE 3,24;16,22-DI-O,O-ISOPROPYLIDÈNEPROTOESCIGÉNINE ET FORMES CRISTALLINES DE CELUI-CI
Publication
Application
Priority
- PL 40230612 A 20121230
- PL 2013000174 W 20131230
Abstract (en)
[origin: WO2014104905A1] Process for preparation of 3,24;16,22-di-O,O-isopropylideneprotoescigenin comprises acetonidation of protoescigenin monohydrate in the mixture consisting of 0 - 100% vol. of acetone and 100 - 0% vol. of 2,2-dimethoxypropane, in presence of catalytic amount of an acid, furnishing precipitation of the crystalline product from the reaction mixture. 3,24; 16,22 -Di-O,O- isopropylideneprotoescigenin is isolated either in crystalline form A or B.
IPC 8 full level
C07J 63/00 (2006.01); C07J 71/00 (2006.01)
CPC (source: EP)
C07J 63/008 (2013.01); C07J 71/0026 (2013.01)
Citation (search report)
See references of WO 2014104905A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2014104905 A1 20140703; EP 2945961 A1 20151125; PL 402306 A1 20140707
DOCDB simple family (application)
PL 2013000174 W 20131230; EP 13828891 A 20131230; PL 40230612 A 20121230