在混合水溶液/THF 溶液中,用三苯基膦对含有N-氧化物部分的杂芳基叠氮化物进行施陶丁格还原,得到胺和亚氨基正膦产物的混合物。结合使用1 H 和31 P NMR 光谱技术进行的产物分析研究表明,在这些系统中,即使在温和条件下,胺产物的产生也不是标准反应机制所预期的亚氨基正膦的水解,而是通过磷酰肼中间体的水解。生成的胺的量取决于起始叠氮化物的结构、溶剂的组成和反应条件。讨论了酸性、中性和碱性条件下胺形成的可能机制。
Copper(II) Acetate/Oxygen-Mediated Nucleophilic Addition and Intramolecular CH Activation/CN or CC Bond Formation: One-Pot Synthesis of Benzimidazoles or Quinazolines
作者:Hua-Feng He、Zhi-Jing Wang、Weiliang Bao
DOI:10.1002/adsc.201000469
日期:2010.11.22
Diarylcarbodiimides or benzylphenylcarbodiimides are converted to 1,2-disubstituted benzimidazoles or 1,2-disustituted quinazolines via addition/intramolecular CH bondactivation/C-N or CC bond forming reaction using copper(II) acetate/oxygen [Cu(OAc)2/O2] as the oxidant at 100 °C in one-pot cascade procedure.
使用乙酸铜(II)/氧[Cu(OAc)2 / O 2)通过加成/分子内CH键活化/ CN或CC键形成反应将二芳基碳二亚胺或苄基苯基碳二亚胺转化为1,2-二取代的苯并咪唑或1,2-取代的喹唑啉以一锅级联程序在100°C下作为氧化剂。
Selective Synthesis of 4-Alkylidene-β-lactams and <i>N</i>,<i>N</i>′-Diarylamidines from Azides and Aryloxyacetyl Chlorides via a Ketenimine-Participating One-Pot Cascade Process
作者:Yun-Yun Yang、Wang-Ge Shou、Deng Hong、Yan-Guang Wang
DOI:10.1021/jo702733h
日期:2008.5.1
A one-pot cascade approach to 4-alkylidene-β-lactams and N,N′-diarylamidines from aryl azides and aryloxyacetyl chlorides has been developed. The chemical outcome of the reaction can be controlled selectively by an appropriate choice of the stoichiometric ratio of different substrates and reagents. The products should find use in pharmaceutical discovery, especially in the development of new antimicrobial
Rh-Catalyzed Annulations of <i>N</i>-Methoxybenzamides and Ketenimines: Sterically and Electronically Controlled Synthesis of Isoquinolinones and Isoindolinones
作者:Xiaorong Zhou、Zhiyin Zhang、Hongyang Zhao、Ping Lu、Yanguang Wang
DOI:10.1021/acs.joc.7b00258
日期:2017.4.7
Rhodium-catalyzedC–Hactivation/annulationreactions of ketenimines with N-methoxybenzamides are reported. The outcome of reactions is dependent on the structure of ketenimines. The β-alkyl-substituted ketenimines furnish 3-iminoisoquinolin-1(2H)-ones in a formal [4 + 2] annulation manner, while the β-ester substituted ketenimines afford 3-aminoisoindolin-1-ones in a formal [4 + 1] annulation manner