“…Quite recently, Stoeckli-Evans and Neier shortly reported a study where unsubstituted and substituted N -Boc silyloxy pyrroles of type 163 and 265 were reacted with aliphatic aldehydes under Lewis acid catalysis, to provide racemic unsaturated lactam compounds (±)- 263 and (±)- 266 (Scheme ). The synthetic procedure led to anti -configuration of the two newly formed stereocenters, and this stereochemical disposition was firmly ascertained via X-ray crystal structure analysis.…”