A convenient access to 2,4-disubstituted quinazolines <i>via</i> one-pot three-component reaction under mild conditions<sup>†</sup>
作者:D. Subhas Bose、Nukala Ramesh
DOI:10.1080/00397911.2020.1744014
日期:2020.5.18
A new and practical method has been developed for the synthesis of 2,4-disubstituted quinolines via one-pot three-componentreaction of o-amino arylketones, aldehydes and ammoniumacetate in high yields by using DDQ in CH3CN under mild conditions. Neutral conditions, atom economy, easy work-up procedures and compatible with different functional groups are the salient features of this protocol. Graphical
Palladium-Catalyzed Cross-Coupling of 4-Tosyloxyquinazolines with Organoindium Reagents: An Efficient Route to 4-Substituted Quinazolines
作者:Yiyuan Peng、Xinglin Ye、Jianjun Yuan、Yirong Zhou、Zhihong Deng、Xuechun Mao
DOI:10.1055/s-0035-1562504
日期:——
of 4-functionalized quinazolines in good to excellent yields. Higher yields were obtained by the one-pot reaction of quinazolinone, p-methylbenzenesulfonyl chloride, Pd2(dba)3-/(2-furyl)3P, and organoindium reagent. These methods using organoindium compounds as coupling partners provided an efficient route to 4-(hetero)aryl/alkylquinazolines, especially 4-substituted quinazolines bearing a halogen scaffold
摘要 描述了在温和条件下通过喹唑啉酮的芳基化或烷基化制备4-取代的喹唑啉的有效途径。在K 2 CO 3存在下,通过喹唑啉酮类与对甲基苯磺酰氯的反应获得了4-甲苯磺酰喹唑啉。在Pd 2(dba)3 /(2-呋喃基)3 P的催化下,在四氢呋喃中进行的4-甲苯磺酰氧基喹唑啉与有机铟试剂的交叉偶联反应导致形成4-官能化的喹唑啉,收率好至极佳。通过一锅反应喹唑啉酮,对甲基苯磺酰氯,Pd 2(dba)3获得更高的收率-/(2-呋喃基)3 P和有机铟试剂。这些使用有机铟化合物作为偶联伙伴的方法为制备4-(杂)芳基/烷基喹唑啉,特别是带有卤素骨架的4-取代喹唑啉提供了一条有效途径。 描述了在温和条件下通过喹唑啉酮的芳基化或烷基化制备4-取代的喹唑啉的有效途径。在K 2 CO 3存在下,通过喹唑啉酮类与对甲基苯磺酰氯的反应获得了4-甲苯磺酰喹唑啉。在Pd 2(dba)3 /(2-呋喃基)3 P的催化下,在四
Nickel-catalyzed Kumada Cross-coupling Reaction for the Synthesis of 2,4-Diarylquinazolines
A series of 2,4‐diarylquinazolines have been successfully synthesized via the Ni‐catalyzed cross‐coupling reaction of quinazoline‐4‐tosylates and aryl Grignard reagents, which provided alternative straightforward approaches for the introduction of aryl groups to quinazolines at C‐4 position.
KEMPTER, G.;LEHM, H. -U.;PLESSE, M.;BARTH, A., J. PRAKT. CHEM., 1982, 324, N 5, 841-846