Synthesis of constrained l -phenylalanine derivatives incorporating a benzazepinone or an azepinone ring as VCAM/VLA-4 antagonists
作者:Achyutharao Sidduri、Jian Ping Lou、Robert Campbell、Karen Rowan、Jefferson W Tilley
DOI:10.1016/s0040-4039(01)01926-8
日期:2001.12
constrained l-phenylalanine derivatives incorporating a benzazepinone or an azepinone ring were synthesized in 13 and 8 steps, respectively, employing a key base-catalyzed intramolecular cyclization reaction. The product, 2, was comparable in potency in a VCAM/VLA-4 ELISA assay to the corresponding unconstrained analog 1 suggesting that cyclization favored the bioactive conformation. However, compound 4 was
采用关键的碱催化的分子内环化反应,分别以13和8个步骤合成了结合有苯并pin庚酮或a苯酮酮环的新型约束L-苯丙氨酸衍生物。产物2在VCAM / VLA-4 ELISA分析中的效力与相应的不受约束的类似物1相当,表明环化有利于生物活性构象。但是,化合物4的效力比不受约束的类似物3低100倍。