Synthesis of 4,5-dihydroazepine-3,6-dicarboxylate derivatives by stereoselective ring expansion-nucleophilic addition to 4-.alpha.-chloroalkyl-1,4-dihydropyridine-3,5-dicarboxylates
Synthesis of 4,5-dihydroazepine-3,6-dicarboxylate derivatives by stereoselective ring expansion-nucleophilic addition to 4-.alpha.-chloroalkyl-1,4-dihydropyridine-3,5-dicarboxylates