The efficiency of conventional heating energy source compared with Infrared (IR), Ultrasound (US), Microwave and the simultaneous combination US-IR eco-friendly approaches for preparation of new N-(5-R 1 -amino-2-nitrophenyl)acetamides and 5-R 1 -amino-2-nitroaniline by Nucleophilic Aromatic Substitution (S N Ar) via addition-elimination reactions on the halogens F, Cl, Br, I, employing amines as nucleophiles were explored. Moreover, phenyldiazenyl derivatives in good yields by an oxidative one-pot S N Ar-based amination reaction from an unusual oxidation of 2phenylhydrazinyl derivatives in DMSO was prepared. ARTICLE HISTORY