Palladium-catalyzed cyclization of vinyl iodide-tethered allensulfonamide
摘要:
This Letter describes a palladium-catalyzed cyclization of vinyl iodide-tethered allensulfonamide in the presence of alkylol, which provides a facile access to 2-alkoxy-3-methylene-tetrahydropyridine. The asymmetric version of this reaction has also been preliminarily realized with up to 81% enantioselectivity when chiral bisphosphine ligands were used. (C) 2014 Elsevier Ltd. All rights reserved.
Palladium-catalyzed cyclization of vinyl iodide-tethered allensulfonamide
摘要:
This Letter describes a palladium-catalyzed cyclization of vinyl iodide-tethered allensulfonamide in the presence of alkylol, which provides a facile access to 2-alkoxy-3-methylene-tetrahydropyridine. The asymmetric version of this reaction has also been preliminarily realized with up to 81% enantioselectivity when chiral bisphosphine ligands were used. (C) 2014 Elsevier Ltd. All rights reserved.
A new cycloisomerisation of Z-1-iodo-4-N-methylbenzenesulfonyl-1,6-enynes to functionalized pyrroles was realized in the presence of an organomolecule (4,4′-bis(1,1-dimethylethyl)-2,2′-bipyridine) and KOtBu.