Iodine (or related species) addition to 1,4-dihydropyridinls, with properly attached substituents at the nitrogen atom, leads to the corresponding 3-iodotetrahydlopyridinium ions, which undergo an internal nucleophilic attack to furnish regio- and stereoselectively iodobi(poly)heterocyclic ring systems in good yields. (C) 1998 Elsevier Science Ltd. All rights reserved.
Iodine (or related species) addition to 1,4-dihydropyridinls, with properly attached substituents at the nitrogen atom, leads to the corresponding 3-iodotetrahydlopyridinium ions, which undergo an internal nucleophilic attack to furnish regio- and stereoselectively iodobi(poly)heterocyclic ring systems in good yields. (C) 1998 Elsevier Science Ltd. All rights reserved.