Zeolite-assisted regioselective synthesis of dinitronaphthalene

Solubility measurement and modelling of 1,8-dinitronaphthalene in nine organic solvents from T=(273.15 to 308.15)K and mixing properties of solutions

“…Combining the equations (7) and (8), the values of a i and b i can be obtained by regressing from the experimental solubility data, and are presented in table 4. It illustrates that the RMSD values calculated with Wilson model are a little larger than those with modified Apelblat equation.…”

“…It is widely used in agriculture, chemical industry, medicine, and many other fields [1][2][3]. Up to now, there are many ways to synthesise 1,8-dinitronaphthalene [4][5][6][7], among which nitration of naphthalene is a usual method. This method can obtain 1,8-dinitronaphthalene with a high composition.…”

Acid‐free and highly efficient one‐step nitration of naphthalene with NO2 promoted by O2‐Ac2O in Fe‐ and Cu‐modified S2O82−/ZrO2 catalyst to 1,5‐dinitronaphthalene under mild conditions

“…These include complicated routes, a significant volume of acid wastewater generated, and high-power consumption. [6][7][8] Conversely, in harder conditions, the one-step nitration of NT to produce only a limited amount of 1,5-DNN (23%$48%) usually involves a catalyst and nitrating agent combination. For example, Liu et al found that the 1,5-DNN selectivity was 48% when NT was nitrated with fuming nitric acid at 65 C using PW/HZSM-5 as a catalyst.…”

Highly selective preparation of valuable dinitronaphthalene from catalytic nitration of 1‐nitronaphthalene with NO2 over HY zeolite

“…Therefore, nitrogen dioxide (NO 2 ) as a green nitrating reagent has aroused widespread attention . For example, Wang et al reported the catalytic nitration reaction of 1‐nitronaphthalene with NO 2 over Hβ zeolite under the oxygen, and 91 % of 1‐nitronaphthalene conversion with 42 % of selectivity to 1,5‐DNN was obtained at 90 °C for 48 h . Squadrito et al employed NO 2 as a nitrating reagent for the nitration of naphthalene in the solution of CCl 4 , only 1,3‐DNN and 2,3‐dinitronaphthalene (2,3‐DNN) were detected, the conversion of naphthalene was only 9 % at 50 °C for 39 h, the significant product 1,5‐DNN was not detected .…”