We have synthesized novel linear and angular furoquinolines via the Rap–Stoermer reaction by conventional as well as microwave method that furnished an enhanced yield. Initially, we synthesized linear furo[2,3-b]quinolines from 3-acetyl-6-chloro-4-phenyl-1H-quinolin-2-one and three different α-halocarbonyl compounds: chloroacetophenone, ethyl chloroacetate, and chloroacetamide. The scope of the methodology was further extended to the synthesis of angular furo[3,2-c]quinolines by utilizing 3-acetyl-4-hydroxy-1-methyl-1H-quinolin-2-one and α-halocarbonyl compounds.
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We thank the NMR Research Center of Indian Institute of Science, Bangalore and Sophisticated Analytical Instrument Facility, Indian Institute of Technology at Madras for providing spectral and analytical services.
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Published in Khimiya Geterotsiklicheskikh Soedinenii, 2016, 52(5), 322–325
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Kumar, D.K., Rajkumar, R. & Rajendran, S.P. Robust synthesis of linear and angular furoquinolines using Rap–Stoermer reaction. Chem Heterocycl Comp 52, 322–325 (2016). https://doi.org/10.1007/s10593-016-1885-8
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DOI: https://doi.org/10.1007/s10593-016-1885-8