期刊
POLYCYCLIC AROMATIC COMPOUNDS
卷 43, 期 6, 页码 5582-5590出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10406638.2022.2105907
关键词
Bridgehead nitrogen heterocycles; fused heterocycles; privileged scaffolds; benzyne; 1,4-dipolar cycloaddition
An efficient method for the synthesis of benzo[4,5]imidazo(1,2-alquinazoline derivatives bearing bridgehead nitrogen is reported. The method involves the reaction of benzokflimidazol-2-amines, aldehydes, and ortho-silyl aryltriflate via 1,4-dipolar cycloaddition under optimized conditions. The one-pot reaction allows for easy formation of fused benzimidazolo-quinazolines through sequential C-N and C-C bond formation.
The development of versatile new routes to bridgehead nitrogen-bearing polycyclic aromatic systems having privileged scaffolds is a synthetic challenge for organic chemists. An efficient synthesis of benzo[4,5]imidazo(1,2-alquinazoline derivatives bearing bridgehead nitrogen by the reaction of benzokflimidazol-2-amines, aldehydes, and ortho-silyl aryltriflate via 1,4-dipolar cycloaddition is reported under the optimized reaction conditions. The methodology provides easy access to fused benzimidazolo-quinazolines by sequential C-N and C-C bond formation through a one-pot reaction. [GRAPHICS] .
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