An Acetone-derived Chiral Stabilised Azomethine Ylid: Synthesis of Enantiomerically Pure 5,5,-Dimethylproline Derivatives
作者:David J. Aldous、Michael G. B. Drew、Estelle M.-N. Hamelin、Laurence M. Harwood、Archie B. Jahans、Sukanthini Thurairatnam
DOI:10.1055/s-2001-18762
日期:——
The chiral stabilised azomethine ylid 3 generated in situ via Lewis acid catalysed condensation of (5S)-5-phenylmorpholin-2-one with 2,2-dimethoxypropane can be trapped diastereoselectively with singly and doubly activated dipolarophiles. The cycloadducts may be dismantled in one pot to furnish enantiomerically pure 5,5-dimethylproline derivatives.