N-acylimidazolidin-2-ones: new chiral auxiliaries for carboxylic acid alkylation
摘要:
Chiral N-acylated imidazolidin-2-ones, readily available from aminoethanols in three steps through the nucleophilic opening of oxazoline intermediates, have been demonstrated to undergo highly diastereoselective benzylations and methylations via their sodium enolates. In most cases, the resulting products are highly crystalline, and the chiral auxiliaries can be readily recycled. (C) 1997 Elsevier Science Ltd.
N-acylimidazolidin-2-ones: new chiral auxiliaries for carboxylic acid alkylation
摘要:
Chiral N-acylated imidazolidin-2-ones, readily available from aminoethanols in three steps through the nucleophilic opening of oxazoline intermediates, have been demonstrated to undergo highly diastereoselective benzylations and methylations via their sodium enolates. In most cases, the resulting products are highly crystalline, and the chiral auxiliaries can be readily recycled. (C) 1997 Elsevier Science Ltd.