Synthesis of pyrazinone ring-containing opioid mimetics and examination of their opioid receptor-binding activity. |
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Authors: | Y Okada A Fukumizu M Takahashi T Yokoi Y Tsuda S D Bryant L H Lazarus |
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Institution: | Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Japan. okada@pharm.kobegakuin.ac.jp |
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Abstract: | Cyclization of dipeptidyl chloromethyl ketones gave 6-(4-aminobutyl)-3-carboxyethyl-5-methyl-2(1H)-pyrazinone, 3-(4-aminobutyl)-6-carboxyethyl-5-methyl-2(1H)-pyrazinone, and 3,6-bis(4-aminobutyl)-5-methyl-2(1H)-pyrazinone, which were inserted into the enkephalin sequence to give opioid mimetics. Thus, it was confirmed that a pyrazinone ring can be easily inserted into a peptide sequence in order to evaluate structural components required for biologically active peptides. |
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