Phillips LR, Nishimura O, Fraser BA. Synthesis and fast-atom-bombardment-mass spectrometry of N-acetylmuramoyl-L-alanyl-D-isoglutamine (MDP).
Carbohydr Res 1984;
132:275-86. [PMID:
6488211 DOI:
10.1016/0008-6215(84)85224-6]
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Abstract
N-Acetylmuramoyl-L-alanyl-D-isoglutamine (MDP) was synthesized by a series of condensations of appropriate reagents, followed by hydrogenolysis. Each intermediate step resulted in a stable, crystalline product. D-Isoglutamine 4-benzyl ester was condensed with N-(tert-butoxycarbonyl)-L-alanine N-hydroxysuccinimide ester, to give N-(tert-butoxycarbonyl)-L-alanyl-D-isoglutamine benzyl ester. Condensation of L-alanyl-D-isoglutamine benzyl ester with N-acetyl-1-O-benzyl-4,6-O-benzylidenemuramic acid, followed by hydrogenolysis, gave MDP. The synthetic scheme was shown to be capable of producing gram quantities of highly pure MDP, as well as a few of its analogs. The synthetic MDP was characterized by analytical and biological methods, and it was found that the use of fast-atom-bombardment-mass spectrometry may greatly simplify the characterization process.
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