Synthesis and evaluation of ω-borono-α-amino acids † as active-site probes of arginase and nitric oxide synthases
作者:Sylvain Collet、François Carreaux、Jean-Luc Boucher、Stéphanie Pethe、Michel Lepoivre、Renée Danion-Bougot、Daniel Danion
DOI:10.1039/a908140b
日期:——
Enantiomerically pure Ï-borono-α-amino acids of various chain lengths have been synthesized according to a general methodology involving condensation of alkenyl and alkynyl bromides with NiII complex of the Schiff base derived from glycine and (S)-2-[Nâ²-(N-benzylprolyl)amino]benzophenone, hydroboration of the intermediate Ï-unsaturated α-amino acids with diisopinocampheylborane, and oxidation with acetaldehyde. Some of these compounds act as potent inhibitors of rat liver and murine macrophage arginases, demonstrating that distance between the B(OH)2 and α-amino acid groups is a key determinant for their interaction with arginase. In contrast, they are without effect on neuronal and inducible NO synthases.
根据一般方法合成了不同链长的对映体纯Ï-硼-δ-氨基酸,包括烯基和炔基溴化物与源自甘氨酸和(S)-2-[Nâ²-(N-苄基丙烯酰)氨基]二苯甲酮的希夫碱的 NiII 复合物缩合,中间体Ï-不饱和δ-氨基酸与二异松蒎烯硼烷氢硼化,以及乙醛氧化。其中一些化合物是大鼠肝脏和小鼠巨噬细胞精氨酸酶的强效抑制剂,这表明 B(OH)2 和 δ-氨基酸基团之间的距离是决定它们与精氨酸酶相互作用的关键因素。相比之下,它们对神经元和诱导型 NO 合酶没有影响。