Regioselective Intramolecular Cycloaddition of C-(1-Acryloyl-2-pyrrolyl)-N-benzylnitrone: Entry to 6-Hydroxy-5-oxoindolizidines
摘要:
The title nitrone underwent intramolecular cycloaddition in regioselective and stereoselective manner, giving one bridged-ring cycloadduct (4). Further elaboration of the latter led to 6-hydroxy-5-oxoindolizidine derivatives (5) and (6), which can be seen as useful intermediates in alkaloids synthesis.