• Sebej, P. et al.: J. Org. Chem., 74, 8647 (1983)
• Gravel, D. et al.: Can. J. Chem., 61, 400 (1983)
• Das, A. et al.: J. Ind. Che,. Soc., 49, 993 (1983)
• For reduction with FeSO4 to the unstable 2-aminobenzaldehyde, see: Org. Synth. Coll., 3, 56 (1955).
• The nitro group can be displaced by nucleophiles. Thus, tert-butanethiol gives 2-tert-butylthiobenzaldehyde, a useful intermediate for thiocoumarins and other sulfur-containing heterocycles: Synthesis, 56 (1978).