A Convenient Synthesis Of 1-Acyl Indolizines by 1, 3-Dipolar Cycloaddition Reactions of Pyridinium Ylides and α, β-Unsaturated Aldehydes or Ketones in the …
Abstract In the presence of tetrakispyridine cobalt dichromate (CoPy4 (HCrO4) 2), pyridinium ylides and α, β-unsaturated aldehydes or ketones undergo 1, 3-dipolar cycloaddition reactions followed by in situ aromatization to give 1-acyl substituted indolizines in moderate to good yields.