Synthesis of immunologically active muramyl dipeptide derivatives containing a quinonyl moiety via aminoacyl intermediates.
作者:TSUNEHIKO FUKUDA、SHIGERU KOBAYASHI、HIDEFUMI YUKIMASA、ISUKE IMADA、MASAHIKO FUJINO、ICHIRO AZUMA、YUICHI YAMAMURA
DOI:10.1248/cpb.29.2215
日期:——
3-(2, 3-Dimethoxy-5-methyl-1, 4-benzoquinon-6-yl) propanoic acid, 10-(2, 3-dimethoxy-5-methyl-1, 4-benzoquinon-6-yl) decanoic acid, 6-(2, 3, 5-trimethyl-1, 4-benzoquinon-6-yl)-hexanoic acid, 9-(2-methyl-1, 4-naphthoquinon-3-yl) nonanoic acid were coupled to Nacetyl-6-O-aminoacylmuramyl-α-aminoisobutyryl-D-isoglutamines by the active ester method. The aminoacyl residues used were Gly, β-Ala, L-Pro, L-Leu, D-Leu, Ahx and Aud. Most of the resulting derivatives showed more potent adjuvant activity than N-acetyl-muramyl-L-alanyl-D-isoglutamine, an active constituent of mycobacterial cell wall peptidoglycan, for the induction of delayed-type hypersensitivity. The strength of the activity was affected by the combination of quinonyl acids and linking amino acids, and the present study indicated that the incorporation of an ω-(2, 3-dimethoxy-5-methyl-1, 4-benzoquinon-6-yl) alkanoyl moiety through Leu was most favorable.
3-(2, 3-二甲氧基-5-甲基-1, 4-苯醌-6-基)丙酸,10-(2, 3-二甲氧基-5-甲基-1, 4-苯醌-6-基)癸酸酸、6-(2,3,5-三甲基-1,4-苯醌-6-基)-己酸、9-(2-甲基-1,4-萘醌-3-基)壬酸与N乙酰基偶联通过活性酯法制备-6-O-氨基酰基胞壁酰-α-氨基异丁酰-D-异谷氨酰胺。使用的氨酰基残基是Gly、β-Ala、L-Pro、L-Leu、D-Leu、Ahx和Aud。大多数所得衍生物显示出比 N-乙酰基-胞壁酰-L-丙氨酰-D-异谷氨酰胺(分枝杆菌细胞壁肽聚糖的活性成分)更有效的佐剂活性,可诱导迟发型超敏反应。活性的强度受到醌酸和连接氨基酸的组合的影响,本研究表明,ω-(2, 3-二甲氧基-5-甲基-1, 4-苯醌-6-基) )通过Leu的烷酰基部分是最有利的。