1-二重氮-2-氧代-(2-N,N-二取代的氨基苯基)乙基苯磺酸二甲酯的热分解产生2-氧代吲哚鎓烯醇酸酯3,这是由于Wolff重排,随后氮原子攻击中间烯酮而产生的部分。还通过卡宾路径形成了由1分解得到的铵化铵5。二甲基1-重氮-2-氧代-(2-(N,N-二取代氨基甲基)苯基)乙基膦酸酯6的热分解过程不同,并通过Wolff重排提供了1 H -2-苯并吡喃9作为唯一的分离产物— [1,5] H平移—闭环顺序。通过X射线晶体学确认3a和5a的结构。
Aromatization of enamines using the TiCl4/Et3N reagent system
摘要:
Aromatization of enamines to the corresponding aniline derivatives using the TiCl4 Et3N reagent system is described. (C) 2002 Elsevier Science Ltd. All rights reserved.
derivatives 4 through Wolff rearrangement and interaction of the tert-amino moiety with the ketene functionality. Variable amounts of either ammoniumylides 5 or of products resulting from their transformations were also formed during the course of the reaction. If the amino moiety was substituted by a benzyl or an allyl group, indolinones, resulting from [1,3] or [1,2] benzylic or allylic shifts,
Pd(OAc)2-catalyzed one-pot preparation of anthranilates from acyclic unsaturated β-enamino esters
作者:Shunya Mikami、Sho Okada、Ryo Kishimoto、Tetsuhiko Takabatake、Masahiro Toyota
DOI:10.1016/j.tetlet.2020.151659
日期:2020.3
A one-pot synthesis of anthranilates from acyclic unsaturated β-enamino esters with a catalytic amount of Pd(OAc)2 was achieved for the first time. The substrates for the key catalytic reaction were easily prepared from acetoacetate esters and amines, and functionalized anthranilates were obtained in moderate to good chemical yields. A simple assembly of a 13C-labeled anthranilate was demonstrated