Imidazolidin-2-ones as practical, efficient chiral auxiliaries in Diels-Alder reactions
摘要:
The readily prepared (4R,5S)-1,5-dimethyl-4-phenylimidazolidin-2-one and its 4-cyclohexyl analogue proved to be very powerful face-selective auxiliaries in catalysed Diels-Alder cycloadditions of their alpha,beta-unsaturated N-acyl dienophile derivatives.