A novel synthetic approach to 4-acetamido-1-arylindazoles via Semmler–Wolff rearrangement of 1-aryl-6, 7-dihydro-5H-indazol-4-one oxime

…, A Murugan, S Ramasubramanian, P Ramachandra…

文献索引：Manjunatha, Sulur G.; Bachu, Sreekanth; Kadambar, Vasantha Krishna; Murugan, Andiappan; Ramasubramanian, Sridharan; Ramachandra, Puranik; Nambiar, Sudhir Tetrahedron Letters, 2014 , vol. 55, # 22 p. 3348 - 3350

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摘要

The major limitations of the above synthetic methods are that these require 1,2,3-suitably substituted aromatic compounds such as 1 and 3, as the starting materials. Moreover, these procedures involve energetic intermediates and starting materials which may pose significant challenge for the scale up. Recently, a few notable methods are reported for the syntheses of 4-aminoindazoles via Buchwald amination of 4-haloindazoles. 5 We believe that there is a need for the ...