Novel method for construction of tetrahydro-1-benzazepine and tetrahydro-2-benzazepine based on 7-endo selective Friedel-Crafts cyclization of vinyloxirane
The 7-endo Friedel-Crafts cyclization of vinyloxiranes, which have a nitrogen atom at the linker between the aromatic ring and the epoxide, was found to proceed regio- and stereoselectively to afford polyfunctional tetrahydro-1-benzazepine and tetrahydro-
A practical route to quinoline from anilines through acid-mediated cyclization of 3-(N-aryl-N-sulfonylamino)propionaldehydes has been developed. Treatment of the cyclization products, dihydroquinoline intermediates with KOH in DMSO leads to substituted quinolines.