N-Acetylmuramyl-L-alanyl-D-isoglutamine (MDP) and thirteen new analogs were synthesized by the conventional organic chemical procedure using dicyclohexylcarbodiimide-N-hydroxy-5-norbornene-2,3-dicarboximide as a coupling agent. Their ability to induce delayed-type hypersensitivity to N-acetyl-3-(4-arsonophenylazo)-L-tyrosine in guinea pigs was assayed. The results indicate that the presence of an α-amino
Muramyl Peptides, 1 Stereochemically Pure Derivatives of Muramic and Isomuramic Acids
作者:Paul H. Gross、Manfred Rimpler
DOI:10.1002/jlac.198619860104
日期:1986.1.14
of their methyl esters (4r and 4s). The high yield and complete separation of 4r and 4s allow a reliable assessment of the low stereoselectivity of the lactyl ether synthesis step from racemic 2-chloropropionic acid. Similarly, syntheses employing pure enantiomers of 2-chloropropionic acid were disclosed as not completely stereospecific. Coupling products with L- and D-alanine esters were prepared for