Pd-Catalyzed Efficient Synthesis of Azacoumestans Via Intramolecular Cross Coupling of 4-(Arylamino)coumarins in the Presence of Copper Acetate under Microwaves
An environmentally-benign electrochemical approach for the construction of quinoline derivatives employing N,N-dimethylformamide (DMF) as the methine source has been devised by cyclization of 4-(phenylamino)-2H-chromen-2-ones. In a user-friendly undivided cell, 6H-chromeno[4,3-b]quinolin-6-ones were obtained under chemical oxidant-free and transition-metal-free conditions in 43–92% yields with high
已经通过 4-(苯基氨基) -2H -chromen-2-ones的环化设计了一种环境友好的电化学方法,用于构建使用N,N-二甲基甲酰胺 (DMF) 作为次甲基源的喹啉衍生物。在用户友好的无隔膜电解槽,6H -chromeno [4,3- b ]喹啉-6-酮进行化学氧化剂-自由和过渡金属-自由条件下在具有高功能性公差43-92%的产率获得。
A general and practicable synthesis of polycyclic heteroaromatic compounds. Part 2. Reaction of quinone-methides of pyridones, pyrimidines, coumarin, and benzene with aromatic amines in a novel synthesis of polycyclic heteroaromatic compounds
作者:Janet L. Asherson、Orhan Bilgic、Douglas W. Young
DOI:10.1039/p19800000522
日期:——
The synthesis of polycyclic heteroaromatic compounds using the reaction of a quinone-methide, generated in situ, with an aromatic amine has been successfully extended using quinone-methides of coumarin and of pyridones. Preliminary studies with the benzenoid quinone-methide (33) have so far proved to give only low yields of the expected acridines. Generation of ‘quinone-methides’ in which the carbonyl
NH
<sub>4</sub>
OAc‐Promoted Cascade Approach towards Aberrant Synthesis of Chromene‐Fused Quinolinones
作者:Santosh Kumari、S. M. Abdul Shakoor、Datta Markad、Sanjay K. Mandal、Rajeev Sakhuja
DOI:10.1002/ejoc.201801292
日期:2019.1.31
A concise cascade, metal‐free strategy for the synthesis of chromene‐fusedquinolinones was developed. This strategy is scalable, and an array of arylhydrazine hydrochlorides delivered chromene‐fusedquinolinones in good to excellent yields.
Synthesis of Polyheteroaromatic Compounds via Rhodium-Catalyzed Multiple C–H Bond Activation and Oxidative Annulation
作者:Shiyong Peng、Suna Liu、Sai Zhang、Shengyu Cao、Jiangtao Sun
DOI:10.1021/acs.orglett.5b02510
日期:2015.10.16
Transition-metal-catalyzed multiple C–Hactivation and sequential oxidative annulation allows rapidly assembling of those compounds from readily available starting materials. A rhodium-catalyzed cascade oxidative annulation of β-enamino esters or 4-aminocoumarins with internal alkynes is described to access those compounds, featuring multiple C–H/N–H bond cleavages and sequential C–C/C–N bond formations in one pot
A regioselective synthesis of pentacyclic compounds containing coumarin, pyrrole, indene without catalysts under microwave irradiation
作者:Zhi-Wei Chen、Jun-Bo Hou、Zhao-Ran Dai、Xiao-Feng Yang
DOI:10.1016/j.cclet.2016.04.009
日期:2016.10
Abstract A concise and efficient approach was developed for the synthesis of pentacyclic compounds containing coumarin, pyrrole, indene in a regioselective manner in good yields via the reactions of N -substituted 4-aminocoumarin compounds and ninhydrin using microwave irradiation. No catalysts are required in our protocol.