Design and synthesis of opioidmimetics containing 2′,6′-dimethyl-l-tyrosine and a pyrazinone-ring platform
作者:Kimitaka Shiotani、Tingyou Li、Anna Miyazaki、Yuko Tsuda、Toshio Yokoi、Akihiro Ambo、Yusuke Sasaki、Sharon D. Bryant、Lawrence H. Lazarus、Yoshio Okada
DOI:10.1016/j.bmcl.2007.08.058
日期:2007.11
Twelve 2 ',6 '-dimethyl-L-tyrosine (Dmt) analogues linked to a pyrazinone platform were synthesized as 3- or 6-[H-Dmt-NH(CH2)(n)],3- or 6-R-2(1H)-pyrazinone (n = 1-4). 3-[H-Dmt-NH-(CH2)(4)]-6-beta-phenethyl-5-methyl-2(1H)-pyrazinone 11 bound to mu-opioid receptors with high affinity (K-i mu = 0.13 nM; Ki delta/K-i mu = 447) with mu-agonism (GPI IC50 = 15.9 nM) and weak delta-antagonism (MVD pA(2) = 6.35), Key factors affecting opioid affinity and functional bioactivity are the length of the aminoalkyl chain linked to Dmt and the nature of the R residue. These data present a simplified method for the formation of pyrazinone opioidmimetics and new lead compounds. (c) 2007 Elsevier Ltd. All rights reserved.