Synthesis and conformational features of topographically constrained designer chimeric amino acids: The β-isopropyl phenylalanines
摘要:
All four optically pure isomers of the highly conformationally constrained novel chimeric amino acid, beta-isopropylphenylalanine or beta-phenylleucine, were asymmetrically synthesized in five to six steps in 20-25% overall yield. Computer-assisted molecular modeling revealed that the beta-isopropyl group in these chimeric amino acids plays the dominant role in determining the most favorable side chain conformations. (C) 1997 Elsevier Science Ltd.