7137-54-4Relevant articles and documents
Poly(4-vinylpyridine)-nitrating mixture complex (PVP-NM): Solid nitrating mixture equivalent for safe and efficient aromatic nitration
Surya Prakash,Gurung, Laxman,Glinton, Kevin E.,Belligund, Kavita,Mathew, Thomas,Olah, George A.
supporting information, p. 3446 - 3451 (2015/06/25)
Friedel-Crafts type aromatic nitration has served as an indispensable reaction within both industrial and academic applications. However, growing concern over the use of copious amounts of strong acids has prompted the search for more environmentally friendly alternatives. Polymer-bound Bronsted acids, on the other hand, have been shown useful as convenient alternatives to liquid acids. Nitric acid and sulfuric acids have, therefore, been combined, both individually and as a mixture, with poly(4-vinylpyridine). The new solid acid systems have been used to nitrate both activated and deactivated arenes under mild conditions and proved to be effective nitrating agent.
Highly regioselective dinitration of toluene over reusable zeolite Hβ
Smith, Keith,Alotaibi, Mohammad Hayal,El-Hiti, Gamal A.
, p. 244 - 247 (2013/02/22)
A nitration system comprising nitric acid, propanoic anhydride, and zeolite Hβ has been developed for dinitration of toluene to give 2,4-dinitrotoluene in 98% yield, with a 2,4-:2,6-dinitrotoluene ratio of over 120. This represents the most selective quantitative method for 2,4-dinitration of toluene; the catalyst is reusable, solvent is not needed, and an aqueous work-up is not required.
Nitration of Alkylbenzenes in Trifluoroacetic Acid
Krylov,Gvozdareva
, p. 1618 - 1623 (2007/10/03)
The substrate selectivity of alkylbenzene nitration with nitric acid in trifluoroacetic acid is controlled either by electronic or by steric effects of the substituents, depending the medium composition and temperature. The positional selectivity of this reaction is sterically controlled, even under electronic control of substrate selectivity.
