79951-46-5Relevant articles and documents
Deactivation mechanisms of iodo-iridium catalysts in chiral amine racemization
Kwan, Maria H.T.,Pokar, Nisha P.B.,Good, Catherine,Jones, Martin F.,Munday, Rachel,Screen, Thomas,Blacker, A. John
, (2020/12/29)
The homogenous, [IrCp?I2]2, SCRAM catalyst (1) is active in the racemization of chiral amines. NMR, kinetic and structural mechanistic studies have determined the cause of catalyst deactivation to occur when ammonia or methylamine are liberated by hydrolysis or aminolysis of the intermediate imine, which tightly coordinate to the iridium centre to block turnover. Control of moisture and substrate concentration can suppress deactivation, whilst partial reactivation of spent catalyst was identified using hydroiodic acid.
Spiro[4,4]-1,6-nonadiene-based phosphine-oxazoline ligands for iridium-catalyzed enantioselective hydrogenation of ketimines
Han, Zhaobin,Wang, Zheng,Zhang, Xumu,Ding, Kuiling
scheme or table, p. 5345 - 5349 (2009/12/01)
-
A low-waste process to sertraline by diastereomeric crystal resolution and waste isomer racemisation
Blacker, A. John,Brown, Stuart,Clique, Blandine,Gourlay, Brian,Headley, Catherine E.,Ingham, Stephen,Ritson, Dougal,Screen, Thomas,Stirling, Matthew J.,Taylor, David,Thompson, Gary
experimental part, p. 1370 - 1378 (2010/04/26)
A semi-continuous method for recovering waste sertraline isomers from a diastereomeric crystallisation process is described in which the mother liquors from a highly selective mandelic acid resolution for the (1S,4S) isomer are treated sequentially with S