Highly enantioselective synthesis of (R)- and (S)-2-amino-5-phosphonopentanoic acids [(R)- and (S)-AP5] via modified Seebach imidazolidinones

Article abstract of DOI:10.1016/0040-4020(95)00091-L

The preparation of four new stereoisomeric 1-carbobenzyloxy-2-tert-butyl-3-(α-methylbenzyl)-1,3-imidazolidin-4-o nes is described. Alkylation of the lithium enolates of these chiral glycine derivatives proceeds with high diastereoselectivity. In particula