One-Pot Preparation of Oxazol-5(4<i>H</i>)-ones from Amino Acids in Aqueous Solvents
作者:Hikaru Fujita、Munetaka Kunishima
DOI:10.1248/cpb.c12-00291
日期:——
method for one-pot synthesis of oxazol-5(4H)-ones has been developed using 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (DMT-MM), which is available for the activation of carboxylic acids in an aqueous solvent. The oxazolones were prepared by the N-acylation of amino acids with carboxylic acids and the subsequent cyclodehydration of the resulting N-acylamino acids by the addition
使用4-(4,6-二甲氧基-1,3,5-三嗪-2-基)-4-甲基吗啉氯化物(DMT-MM)开发了一种一锅合成oxazol-5(4H)-的方法),可用于在水性溶剂中活化羧酸。通过将氨基酸与羧酸进行N-酰化反应,然后通过添加N,N-二乙基苯胺对所得的N-酰基氨基酸进行环脱水反应,制得恶唑酮。由于这两种反应都是在水性溶剂中使用相同的偶联剂DMT-MM有效地进行的,因此简化了程序并易于进行。另外,通过控制反应体系的碱性已经合成了5-(三嗪基氧基)恶唑衍生物。