Rhodium-Catalyzed Regioselective Direct C-H Amidation of 2,4-Diarylquinazoline with Sulfonyl Azides: An Example of Steric Hindrance Regulated Mono- and Diamidation Selectivity
An unprecedented sterichindrance controlled regioselectiverhodium-catalyzeddirectC–Hamidation of 2,4-diarylquinazoline was described. Sulfonylazides were used as the amine source to provide a variety of amide-functionalized 2,4-diarylquinazolines in high efficiency. The reaction proceeded under mild conditions, had good functional group tolerance with a broad scope of substrates, and afforded
Palladium-Catalyzed and Quinazoline-Directed C–H Selective Acetoxylation of 2-Arylquinazolines
作者:Yiyuan Peng、Song Wei、Banlai Ouyang、Zhihong Deng、Qin Yang
DOI:10.1055/s-0037-1611908
日期:2019.10
successfully synthesized via the Pd-catalyzed and quinazoline-directed C–H activation/acetoxylation of the corresponding 2-arylquinazolines with iodobenzene diacetate in AcOH/Ac2O. A series of acetoxylated 2-arylquinazolines have been successfully synthesized via the Pd-catalyzed and quinazoline-directed C–H activation/acetoxylation of the corresponding 2-arylquinazolines with iodobenzene diacetate in AcOH/Ac2O
抽象的 通过在相应的2-芳基喹唑啉在AcOH / Ac 2 O中用碘代苯二乙酸酯进行Pd催化和喹唑啉定向的CH活化/乙酰氧基化,已成功合成了一系列乙酰氧基化的2-芳基喹唑啉。 通过在相应的2-芳基喹唑啉在AcOH / Ac 2 O中用碘代苯二乙酸酯进行Pd催化和喹唑啉定向的CH活化/乙酰氧基化,已成功合成了一系列乙酰氧基化的2-芳基喹唑啉。
Rhodium-catalyzed malonation of 2-arylquinazolines with 2-diazomalonates: double C–H functionalization
A one-pot synthesis of 2,4-disubstituted quinazoline derivatives from halofluorobenzenes with nitriles was reported, via sequential nucleophilic addition and SNAr reaction. The advantages of the present approach are transition metal free, easy to operate, and all the starting materials are commercially available.
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.