7442-21-9Relevant articles and documents
Origin of the Diastereoselectivity of the Heterogeneous Hydrogenation of a Substituted Indolizine
Cormanich, Rodrigo A.,Zeoly, Lucas A.,Santos, Hugo,Camilo, Nilton S.,Bühl, Michael,Coelho, Fernando
supporting information, p. 11541 - 11548 (2020/10/12)
In this work, the stereoselective heterogeneous hydrogenation of a tetrasubstituted indolizine was studied. Partial hydrogenation products were obtained in three steps from a substituted pyridine-2-carboxaldehyde prepared from commercial pyridoxine hydrochloride. The hydrogenation of the indolizine ring was shown to be diastereoselective, forming trans-6b and cis-9. Theoretical calculations (ab initio and DFT) were used to rationalize the unusual trans stereoselectivity for 6b, and a keto-enol tautomerism under kinetic control has been proposed as the source of diastereoselectivity.
