Imide capture of a C-terminal peptidylazide with a side-chain thioacid derivative of an N-terminally protected aspartyl peptide leads to the formation of an imide bond bringing the two peptide ends into close proximity. Unmasking of the Nα protecting group and intramolecular acyl migration results in the formation of a native peptidebond to asparagine.
n‐Bu4NI/K2S2O8‐Mediated C−N Coupling Between Aldehydes and Amides
作者:Xiaochen Liu、Samual Hee、Netanel G. Sapir、Alvin Li、Syed Farkruzzaman、Jianbo Liu、Yu Chen
DOI:10.1002/ejoc.202400067
日期:2024.6.17
coupling between aldehydes and amides is reported. When an aromatic aldehyde bears electron-donating groups at either the ortho or para position of the formyl group, a transformylation takes place exclusively. Without these groups, a cross-dehydrogenative coupling dominates. Furthermore, when 2-aminobenzamide is employed, only quinazolin-4(3H)-ones are obtained regardless of the aldehyde used.
据报道,醛和酰胺之间存在n -Bu 4 NI/K 2 S 2 O 8介导的底物依赖性 CN-N 偶联。当芳香醛在甲酰基的邻位或对位带有给电子基团时,仅发生转化酰化。如果没有这些基团,则交叉脱氢偶联占主导地位。此外,当使用2-氨基苯甲酰胺时,无论使用何种醛,都仅获得喹唑啉-4( 3H )-酮。
326. Acylation and allied reactions catalysed by strong acids. Part XVI. The reactions of some ω-phenylalkanoyl perchlorates
作者:H. Burton、D. A. Munday
DOI:10.1039/jr9570001718
日期:——
Condensations at the Methyl Groups of N-Acetylbenzamide and Diacetylimide by Means of Potassium Amide in Liquid Ammonia
作者:Stewart D. Work、David R. Bryant、Charles R. Hauser
DOI:10.1021/ja01059a025
日期:1964.3
Colby; Dodge, American Chemical Journal, 1891, vol. 13, p. 6