The Synthesis of the High-Potency Sweetener, NC-00637. Part 3: The Glutamyl Moiety and Coupling Reactions
作者:David J. Ager、Scott Babler、Robert A. Erickson、Diane E. Froen、Jeannine Kittleson、David P. Pantaleone、Indra Prakash、Ben Zhi
DOI:10.1021/op0341115
日期:2004.1.1
The synthesis of the high-potency sweetener, NC-00637 (1), required selective preparation of the γ-protected glutamic acid. Coupling of the three components could be performed in any order, but the final route involved N-acylation of the protected l-glutamic acid with the acid chloride derived from (S)-2-methylhexanoic acid. Activation of the α-carboxyl group allowed condensation with 5-amino-2-cyanopyridine
高效甜味剂 NC-00637 (1) 的合成需要选择性制备 γ-保护的谷氨酸。三种组分的偶联可以以任何顺序进行,但最终路线涉及受保护的 L-谷氨酸与衍生自 (S)-2-甲基己酸的酰氯的 N-酰化。α-羧基的活化允许与 5-氨基-2-氰基吡啶 (4) 缩合。γ-酯 19 的皂化然后提供甜味剂 1。