摘要:
The synthesis of two new macrocyclic ligands, N,N',N"-tris[2(S)-hydroxybutyric acid]-1,4,7-triazacyclononane and N,N',N"-tris[2(S)-hydroxybutyric acid]-1,5,9-triazacyclododecane is reported. Each macrocycle bears three L-lactate-like pendant arms. Starting from L-malic acid, the absolute configuration of the alpha-(S)-hydroxy acid was kept along the synthesis leading to pure (S,S,S) enantiomers. (C) 1999 Published by Elsevier Science Ltd. All rights reserved.