Use of the N–O Bonds in N-Mesyloxyamides and N-Mesyloxyimides To Gain Access to 5-Alkoxy-3,4-dialkyloxazol-2-ones and 3-Hetero-Substituted Succinimides: A Combined Experimental and Theoretical Study
作者:René Peters、Lucca Pfitzer、Juliane Heitkämper、Johannes Kästner
DOI:10.1055/s-0042-1751447
日期:2023.8
The reactivity of N-mesyloxyamides and -imides with bases was studied based on the initial hypothesis of a possible [3,3]-rearrangement. While the intended α-sulfonyloxylation method could not be developed, the formation of valuable N-containing heterocyclic products was found. Treating N-mesyloxyamides with triethylamine gave fully substituted oxazolone products, which are masked α-amino acid derivatives
基于可能的 [3,3]-重排的初始假设,研究了N -mesyloxyamides 和 -imides 与碱基的反应性。虽然无法开发预期的 α-磺酰氧基化方法,但发现了有价值的含 N 杂环产物的形成。用三乙胺处理N -mesyloxyamides 得到完全取代的恶唑酮产物,它们是掩蔽的 α-氨基酸衍生物。这些产物是通过计算方法鉴定的,该方法表明 α-内酰胺首先是通过分子内亲核取代从初始烯醇化物形成的。作为紧张的中间体,它们很容易重排为恶唑酮产品。有一个循环N-甲磺酰亚胺,发现消除为马来酰亚胺。这可能表明发生了磺酰氧基化,但相应的产物可能已被消除。然后添加亲核试剂以通过取代甲磺酸盐来捕获这种可疑的中间体。这样,就可以形成四元 α-氮和 α-氧取代的琥珀酰亚胺,它代表了一个重要的药理学类别,因其在药物设计中的价值而备受关注。