An efficient Pd-catalyzed oxidative coupling of aromatic primary amines and alkenes under molecular oxygen is disclosed. Under mild reaction conditions, it provides a rapid access to (Z)-enamine compounds with exceptional functional group tolerance and excellent regio- and stereoselectivity. This attractive route is of great significance due to its applicability to a wide range of aromatic primary
Synthesis of novel heterocycles related to the dynemicin a ring skeleton
作者:K. C. Nicolaou、Jonathan L. Gross、Michael A. Kerr
DOI:10.1002/jhet.5570330336
日期:1996.5
framework of dynemycin A (1) are reported. A series of quinoline based dienophiles containing an activating group (e.g. 5, Scheme 1), reacted with acyclic dienes (e.g. 4, Scheme 1) in a Diels-Alder fashion under increased pressure to afford a variety of heterocyclic systems related to the CDE skeleton of dynemycin A. Reaction of dienophile 15 with cyclic diene 29 led to the novel hetereocycle 34 whereas
Formation of 1,2-Dihydroquinoline-3-carboxylic Acid Derivatives from Methyl 3-(Arylamino)acrylates with Hydrogen Iodide
作者:Shoji Matsumoto、Takahiro Mori、Motohiro Akazome
DOI:10.1055/s-0030-1258229
日期:2010.11
The reaction of methyl 3-(arylamino)acrylates with hydrogen iodide gave 1,2-dihydroquinoline-3-carboxylic acid derivatives at room temperature. This reaction proceeds efficiently in alcoholic solvent; bulky tert-butyl alcohol is the best solvent to give the 1,2-dihydroquinoline derivatives. It is particularly interesting that hydrogen iodide is the most efficient acid to achieve this reaction in tert-butyl
5-methoxycarbonyl isomer 8) behaved as good dienophiles to some kind of 1,3-dienes examined. In most cases, the products were explained by the reaction where the largest lobe of HOMO of dienes reacted to the larger LUMO of dienophiles in an expected cis-endo manner. However, in the reactions of 8 with alkylbutadienes, piperylene and isoprene, abnormality in the reaction was observed, which was well explained by taking
Selenated NHC-Pd(II) Pincer Complex Catalyzed, Temperature-Dependent Selective Hydroamination and Oxidative Amination of Olefins: Formation of Enamine Esters and β-Amino Esters under Solvent-Free and Aerobic Conditions
作者:Charu Sharma、Sangeeta Kumari、Deepak Sharma、Avinash K. Srivastava、Raj K. Joshi
DOI:10.1021/acs.joc.3c01706
日期:2024.1.5
NHC-Pd(II) pincer catalyzed oxidative amination and hydroamination of olefins is developed under solvent-free aerobic conditions. Reaction offered a temperature-controlled synthesis of (Z)-enamine and β-amino esters to provide easy access and remarkable functional group tolerance for a variety of enamines. The developed approach renders an opportunity of scalability and flexibility, and besides this
NHC-Pd(II)钳催化烯烃氧化胺化和加氢胺化是在无溶剂有氧条件下开发的。 Reaction 提供了 ( Z )-烯胺和 β-氨基酯的温控合成,为各种烯胺提供了方便的获取和显着的官能团耐受性。所开发的方法提供了可扩展性和灵活性的机会,除此之外,产生的烯胺可以转化为许多含氮杂环,强调了其在合成和药物化学中的潜在用途。此外,这是首次报道苯胺与苯乙烯的偶联。