Metal-free construction of tricyclic or tetracyclic compounds—acid-promoted synthesis of benzo [4, 5] imidazo [2, 1-a] isoindole and 1, 2-dialkyl-2, 3- …
J Chen, J Qu, Y Zhang, Y Chen, N Liu, B Chen
Index: Chen, Jinying; Qu, Jinpeng; Zhang, Yuanqing; Chen, Yongxin; Liu, Na; Chen, Baohua Tetrahedron, 2013 , vol. 69, # 1 p. 316 - 319
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Citation Number: 8
Abstract
An environmental friendly, efficient, and easy to operate strategy for synthesizing of benzo [4, 5] imidazo [2, 1-a] isoindole and 1, 2-dialkyl-2, 3-dihydrobenzimidazoles via acid- promoted coupling of dialdehyde and o-diaminobenzene under metal-free conditions is described. A series of products were generated in good yields under mild conditions.
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