Dimethyl 5-nitro­isophthalate

Bis(4-carboxy­piperidinium) 5-nitro­isophthalate

Cocrystallization of 4-carboxypiperdine with 5-nitro-isophthalic acid afforded the title salt, 2C(6)H(12N)O(2) (+)·C(8)H(3)NO(6) (2-), in which the heterocyclic N atoms are protonated and the carboxylic acid groups are deprotonated. In the crystal, inter-molecular N-H⋯O and O-H⋯O hydrogen-bonding inter-actions assemble the ions into a three-dimensional network.

Dehydration of Methanol to Dimethyl Ether Employing Modified H-ZSM-5 Catalysts

Crystal structure of bis­(prop-2-yn-1-yl) 5-nitro­isophthalate

The whole mol-ecule of the title compound, C14H9NO6, is generated by twofold rotation symmetry; the twofold axis bis-ects the nitro group and the benzene ring. The nitro group is inclined to the benzene ring by 14.42 (9)°. The prop-2-yn-1-yl groups are inclined to the benzene ring by 13 (2)° and to each other by 24 (3)°; one directed above the plane of the benzene ring and the other below. In t...

NITROIMIDAZOLES IV [I]. SYNTHESIS OF 3,s-DICARBO ALKOXY-2,6-DIMETHYL-4-(1 -METHYL-5- NITRO-2-1MIDAZOLYL)-1,4-DIHYDROPYRIDIANNE D 3,5-DICARBOALKOXY- 2,6-DIMETHYL-4(-2 -S UBSTI - TUTED-4-THIAZOLYL)-l , 4- DIHYDROPYRIDINE

Different procedures for the syntheses of the title compounds were investigated. The best method for the preparation of the title compounds were the reaction of the readily available 2-formyL-1-methyl-5-nitroimidazole2- substituted-4-formylthiazoles with alkyl acetoacetate and alkyl aminocrotonate in boiling alcohol.

Dimerization of acetoacetamide leading to 5-carbamoyl-4,6-dimethyl-2-pyridone.

The dimerization of acetoacetamide easily proceeds at room temperature in a dimethyl sulfoxide solution to afford 5-carbamoyl-4,6-dimethyl-2-pyridone.