N-aryl proline derivatives using amino-tethered α-diazoesters and cheap, readily available iron salts. Mechanistically, the aminocyclization reaction involves the initial formation of an iron-carbene complex followed by a nucleophilic attack of the aniline nitrogen atom to give an ammoniumylideintermediate, which finally undergoes the iron-promoted dealkylation.
Photoredox-Catalyzed α-Aminomethyl Carboxylation of Styrenes with Sodium Glycinates: Synthesis of γ-Amino Acids and γ-Lactams
作者:Cong Zhou、Miao Li、Jianwei Sun、Jiang Cheng、Song Sun
DOI:10.1021/acs.orglett.1c00536
日期:2021.4.16
previous reactions with the same type of substrates leading to simple decarboxylation and olefin hydroalkylation, this process involves additional CO2 sequestration, thus leading to olefin α-aminomethyl carboxylation. These findings not only provide new access to α,α-disubstituted γ-amino acids and γ-lactams but also serve as a proof of concept for CO2 reutilization in decarboxylation reactions.
已开发出一种可见光光氧化还原催化的苯乙烯与甘氨酸钠和 CO 2 的还原性α-氨基甲基羧化反应,以高效和区域选择性地合成一系列α,α-二取代 γ-氨基酸和 γ-内酰胺。值得注意的是,从脱羧步骤释放的CO 2可以重新用于随后的羧化。与之前使用相同类型底物导致简单脱羧和烯烃加氢烷基化的反应不同,该过程涉及额外的 CO 2封存,从而导致烯烃 α-氨基甲基羧化。这些发现不仅提供了对α,α-二取代的γ-氨基酸和γ-内酰胺,但也可作为脱羧反应中CO 2 再利用的概念证明。
Formation and behavior of intramolecular <i>N-</i>(styrylalkyl)aniline exciplexes
作者:Frederick D. Lewis、Jill M. Wagner-Brennan、Alan M. Miller
DOI:10.1139/cjc-77-5-6-595
日期:——
investigated and for one of the three secondary anilines. More rapid exciplex formation in nonpolar vs. polarsolvents is attributed to the necessity of desolvating the polar aniline singlet in polarsolvents. Intramolecular adduct formation is the major photochemical process for the secondary anilines, but is highly inefficient for the tertiary anilines. The behavior of the intramolecular aniline-styrene