Methyl N-p-tolylsulphonylanthranilate and methyl 4-chloro-N-p-tolylsulphonylanthranilate have been converted via the N-2-chloroprop-2-enyl derivatives into the corresponding benzyl alcohols, which cyclised in 90% sulphuric acid to give N-p-tolylsulphonyltetrahydro-1-benzazepin-3-ones.
D. N. Gupta, I. McCall, A. McLean and G. R. Proctor, J. Chem. Soc. C, 1970, 2191 DOI: 10.1039/J39700002191
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