Vanadium Pentoxide as a Catalyst for Regioselective Nitration of Organic Compounds under Conventional and Nonconventional Conditions

Abstract

Vanadium pentoxide is used as an efficient catalyst for regioselective nitration of aromatic compounds under conventional and nonconventional conditions such as ultrasonically assisted (USAR) and microwave-assisted reactions (MWAR). The reactions underwent smoothly and afforded good yields of products with high regioselectivity. Observed longer reaction times (about 8 h) in V₂O₅ catalyzed reactions reduced to (0.5/30 min) under sonication and (90 s) in the case of MWAR. When ortho position is blocked, para derivatives are obtained as end products while ortho nitro products are obtained when para position is blocked.

Keywords:

• microwave irradiation
• rate accelerations
• regioselective nitration
• sonication
• vanadium pentoxide