PHOSPHINE- AND PHOSPHITE-SUBSTITUTED 3,3′-BI-INDOLIZINES- NEW ATROPISOMERIC LIGANDS
摘要:
For the first time enantiomerically pure phosphine- or phosphite-substituted 1,1'-alkyl-3,3'-bi-indolizines were obtained. In situ prepared rhodium complexes of these compounds were tested in hydroformylation of styrene and methylstyrene.
Chlorination of enantiomerically pure 1,1′-bis(hydroxyalkyl)-3,3′-biindolizines: conservation of chirality by thermal treatment
摘要:
Enantiomerically pure
1,1â²-bis(hydroxyalkyl)-3,3â²-biindolizines 1 racemize
unexpectedly by reaction with tetra-chloromethaneâtriphenylphosphine
at room temperature affording the corresponding dichloro compounds 2,
whereas the chirality is preserved at higher reaction temperatures.
For the first time enantiomerically pure phosphine- or phosphite-substituted 1,1'-alkyl-3,3'-bi-indolizines were obtained. In situ prepared rhodium complexes of these compounds were tested in hydroformylation of styrene and methylstyrene.
Chlorination of enantiomerically pure 1,1′-bis(hydroxyalkyl)-3,3′-biindolizines: conservation of chirality by thermal treatment
Enantiomerically pure
1,1â²-bis(hydroxyalkyl)-3,3â²-biindolizines 1 racemize
unexpectedly by reaction with tetra-chloromethaneâtriphenylphosphine
at room temperature affording the corresponding dichloro compounds 2,
whereas the chirality is preserved at higher reaction temperatures.