- Method for synthesizing BTAHNAB by taking 3, 5-dichlorobenzoic acid as raw material
-
The invention belongs to the technical field of organic energetic materials and preparation methods thereof, and provides a method for synthesizing a novel heat-resistant energetic material BTAHNAB bytaking 3, 5-dichlorobenzoic acid as a raw material. The method comprises the following steps of: adding 3, 5-dichlorobenzoic acid into nitro-sulfuric acid, and carrying out reaction to obtain 3, 5-dichloro-4-nitrobenzoic acid; adding the 3, 5-dichloro-4-nitrobenzoic acid into sulfuric acid, dropwise adding chloroform, adding sodium azide, and carrying out reaction to obtain 3, 5-dichloro-4-nitroaniline; sequentially adding sodium nitrate and 3, 5-dichloro-4-nitroaniline into sulfuric acid, and carrying out reaction to obtain 3, 3', 5, 5'-tetrachloro-2, 2', 4, 4', 6, 6'-hexanitroazobenzene; performing mixing with toluene, introducing ammonia gas at a constant speed, stopping introducing the ammonia gas at the end of the reaction, and continuously carrying out reaction to obtain the BTAHNAB. Through calculation and test analysis, the detonation velocity of the final product exceeds 8000m/s, the melting point is larger than 330DEG C, the thermal decomposition temperature is close to 400DEG C, and the final product has good stability and thermal stability, and is a novel heat-resistant explosive with wide application prospects.
- -
-
-
- Oxidative chlorination, desulphonation, or decarboxylation to synthesize pharmaceutical intermediates: 2,6-Dichlorotoluene, 2,6-dichloroaniline, and 2,6-dichlorophenol
-
An alternative manufacturing process scheme was developed for 2,6-dichlorotoluene, 2,6-dichloroaniline, and 2,6-dichlorophenol, involving oxidative chlorination after protection of the starting material in the para position followed by deprotection involving desulphonation or decarboxylation. Oxidative chlorination of 4-methylbenzenesulphonic acid, 4-methylbenzoic acid, 4-aminobenzoic acid, and 4-hydroxybenzoic acid by using HCl-H2O2, and their subsequent desulphonation or decarboxylation, gave a 60-75% yield of the desired product.
- Mukhopadhyay,Chandalia
-
-
- SYNTHESIS AND STRUCTURE OF MONOCHLORO DERIVATIVES OF 2-(4-AMINOPHENYL)-5(6)-AMINOBENZIMIDAZOLE
-
Methods for the production of the monochloro derivatives of 2-(4-aminophenyl)-5(6)-aminobenzimidazole from chloronitrobenzanilides or by the condensation of 1,2,4-triaminobenzene with chloroaminobenzoic acid were investigated.It was established that the nitration of o-chlorobenzanilides takes place selectively in a mixture of acetic acid, acetic anhydride, and chloroform, while the nitration of 4(7)- or 5(6)-chlorobenzimidazoles takes place in sulfuric acid.The effect of the chlorine atoms and the nitro (amino) group on the IR and PMR spectra of the benzanilides and benzimidazoles is determined by their mutual position and by the position in relation of the amide bridge or the condensed imidazole ring.Analysis of the PMR spectra of the chlorodiaminophenylbenzimidazoles indicated that the amino group was localized at position 6 of the benzimidazole ring.
- Shchel'tsyn, V. K.,Frolova, T. I.,Grudtsyn, Yu. D.,Vandysheva, E. A.,Kaminskii, A. Ya.,Leonova, V. V.
-
p. 2132 - 2142
(2007/10/02)
-
- Pesticidal compounds
-
Bicyclooctane pesticides of the formula are prepared by cyclisation of In these formulae R may be various organic groups and is preferably n-butyl or n-propyl while R2 is a polysubstituted phenyl group.
- -
-
-