Oxaziridine-Mediated Amination of Primary Amines: Scope and Application to a One-Pot Pyrazole Synthesis
作者:Alan Armstrong、Lyn H. Jones、Jamie D. Knight、Richard D. Kelsey
DOI:10.1021/ol0474507
日期:2005.2.1
Electrophilic amination of primary aliphatic and aromatic amines is reported using a diethylketomalonate-derived oxaziridine to afford the corresponding N-Boc hydrazines in good to excellent yields. The method allows a one-pot synthesis of pyrazoles from primary amines. [Reaction: see text]
[Ce(<scp>l</scp>-Pro)<sub>2</sub>]<sub>2</sub> (Oxa) as a heterogeneous recyclable catalyst: synthesis of pyrazoles under mild reaction conditions
作者:Ramesh Katla、Rakhi Chowrasia、Padma S. Manjari、Caren D. G. da Silva、Beatriz F. dos Santos、Nelson L. C. Domingues
DOI:10.1039/c6nj01723a
日期:——
A highly efficient method for the synthesis of pyrazoles mediated by [Ce(l-Pro)2]2 (Oxa) as a heterogeneous catalyst.
一种由[Ce(l-Pro)2]2 (Oxa)作为非均相催化剂介导的吡唑合成的高效方法。
Photochemically Mediated Ring Expansion of Indoles and Pyrroles with Chlorodiazirines: Synthetic Methodology and Thermal Hazard Assessment
作者:Ben W. Joynson、Graham R. Cumming、Liam T. Ball
DOI:10.1002/anie.202305081
日期:2023.8
demonstrate that pyridinium and quinolinium salts can be accessed by the insertion of a single C-atom from an arylchlorodiazirine into the parent N-alkyl pyrrole or indole. The azinium products of ringexpansion are activated towards oxygenation and hydrogenation, expediting further structural diversification. Safer methods for the use of diazirines as carbene precursors have been developed with insight
我们证明,吡啶盐和喹啉盐可以通过将芳基氯二嗪中的单个 C 原子插入母体 N-烷基吡咯或吲哚来获得。扩环的氮化产物被激活,进行氧化和氢化,加速了进一步的结构多样化。利用差示扫描量热法的洞察力,已经开发了使用二嗪嗪作为卡宾前体的更安全的方法。