74834-85-8Relevant articles and documents
Studies on phenothiazines, Part 6. Synthesis of 3-alkoxy-1-nitro-7-substituted phenothiazines via Smiles rearrangement
Gupta, R.R.,Jain, S.K.,Goswami, Naresh K.,Kalwania, G.S.
, p. 831 - 836 (2007/10/02)
Synthesis of 3-alkoxy-1-nitro-7-substituted phenothiazines via Smiles rearrangement is reported. 5-Alkoxy-2-amino-3-nitro benzenethiols prepared by hydrolytic fission of 6-alkoxy-4-nitrobenzo-1,2,3-dithiazolium chloride (The Herz Compound) were condensed with substituted o-chloro-nitrobenzenes and the diaryl sulfides so obtained were converted into formyl derivatives by formic acid.The latter on treatment with alkoholic KOH underwent Smiles rearrangement yielding 3-alkoxy-1-nitro-7-substituted phenothiazines.