Synthesis of complex δ-acetylenic amino acids as potential multisubstrate adduct inhibitors of methyltransferases
作者:Mark R. Burns、James K. Coward
DOI:10.1016/0968-0896(96)00139-3
日期:1996.9
of the nucleoside-containing amino acids, a potential multisubstrate adduct inhibitor of catechol O-methyltransferase was synthesized via this route. Unfortunately, the sensitivity to acid of 5'-deoxy, 5'-carbanucleosides prevented successful completion of the synthesis of a second nucleoside-containing delta-amino acid as a possible inhibitor of phenethanolamine N-methyltransferase.
描述了两种类型的δ-炔基氨基酸的合成。关键中间体是通过两种不同的途径从末端乙炔衍生而来的:(1)钯介导的Heck型芳基化反应,和(2)Simmons-Smith同源化反应,然后使生成的炔丙基有机金属与苯甲酰基三甲基硅烷反应。对所需氨基酸的进一步加工涉及将衍生自N-亚苄基甘氨酸酯的碳负离子与复杂的烷基卤化物偶合。使用该化学方法成功地完成了非核苷δ-炔属氨基酸的合成。在含有核苷的氨基酸的情况下,通过该途径合成了潜在的邻苯二酚O-甲基转移酶的多底物加合物抑制剂。不幸的是,5'-脱氧,5'对酸的敏感性