A novel one-pot three-component reaction: synthesis of triheterocyclic 4H-pyrimido[2,1-b]benzazoles ring systems |
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Authors: | Shaabani Ahmad Rahmati Abbas Naderi Soheila |
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Institution: | Department of Chemistry, Shahid Beheshti University, PO Box 19396-4716, Tehran, Iran |
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Abstract: | A novel one-pot three-component condensation reaction of an aldehyde, β-ketoester and 2-aminobenzimidazole or 2-aminobenzothiazole in 1,1,3,3-N,N,N′,N′-tetramethylguanidinium trifluoroacetate as an ionic liquid is described. During the course of this reaction 4H-pyrimido2,1-b]benzimidazoles or 4H-pyrimido2,1-b]benzothiazoles are formed in high yields at 100 °C. The ionic liquid can be recovered conveniently and reused efficiently. |
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Keywords: | Multicomponent 2-Aminobenzimidazole 2-Aminobenzothiazole 4H-Pyrimido[2 1-b]benzothiazoles 4H-Pyrimido[2 1-b]benzimidazoles |
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