Zeolite-assisted nitration of neat toluene and chlorobenzene with a nitrogen dioxide/molecular oxygen system. Remarkable enhancement of para-selectivity

✍ Scribed by Xinhua Peng; Hitomi Suzuki; Chunxu Lu

• Publisher: Elsevier Science
• Year: 2001
• Tongue: French
• Weight: 60 KB
• Volume: 42
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)00750-x

✦ Synopsis

In the presence of molecular oxygen and HZSM-5, neat toluene reacted with liquid nitrogen dioxide in a regioselective manner at room temperature to yield mononitrotoluenes as the main product, where the para isomer predominated up to 90% and the ortho-para isomer ratio improved to 0.08. Chlorobenzene behaved similarly, giving a para-predominant nitration product.