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Synlett 2001; 2001(2): 0299-0301
DOI: 10.1055/s-2001-10786
DOI: 10.1055/s-2001-10786
letter
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Improved Synthesis of a New Nonpeptidic Inhibitor of Human Neutrophil Elastase
Further Information
Publication History
Publication Date:
31 December 2001 (online)
![](https://www.thieme-connect.de/media/synlett/200102/lookinside/thumbnails/10.1055-s-2001-10786-1.jpg)
A practical method for the synthesis of ONO-6818 {2-(5-Amino-6-oxo-2-phenylhydropyrimidinyl)-N-[2-(5-tert-butyl-1,3,4-oxadiazol-2-yl)-1-(methylethyl)-2-oxoethyl]acetamide} (1), the first clinical candidate for a nonpeptidic orally active inhibitor of human neutrophil elastase (HNE), was developed. This method includes a Lossen rearrangement instead of an explosive Curtius rearrangement and the improved preparation of the α-aminoketone.
enzyme inhibitor - aminopyrimidinone - ketooxadiazole - Lossen rearrangement - anionic addition reaction