One step preparation and 1,3-dipolar cycloadditions of (S)-5-hydroxymethyl-1-pyrroline N-oxide
摘要:
The cyclic nitrone Ib has been prepared in enantiomerically pure form by direct oxidation of L-(+)-prolinol with dimethyldioxirane. A complete diastereoface differentiation has been observed in the 1,3-dipolar cycloaddition reaction of this nitrone to several 1,2-disubstituted electron deficient olefins. (C) 1997 Elsevier Science Ltd.