Novel intramolecular cycloaddition reactions of arylamino-substituted Fischer chromium carbenes
摘要:
Thermal reaction of N-arylamino-substituted Fischer chromium carbenes having a pendant 2-(1-alkenyl)substituent on the benzene ring affords either substituted indoles or quinolines, depending on starting material, via an intramolecular [2 + 2] cycloaddition forming a metallacyclobutane followed by metathesis to give indoles or beta-elimination to give quinolines.