4-(4-Methoxybenzoyl)-5-(4-methoxyphenyl)-2,3-dihydro-2,3-furandione

Abstract

Key indicatorsSingle-crystal X-ray study T = 293 K Mean '(C±C) = 0.005 A Ê R factor = 0.045 wR factor = 0.116 Data-to-parameter ratio = 10.2 For details of how these key indicators were automatically derived from the article, see http://journals.iucr.org/e. # 2002 International Union of Crystallography Printed in Great Britain ± all rights reservedThe title compound, C 19 H 14 O 6 , is a derivative of 2,3-dioxo-2,3dihydrofuran. The furan ring is essentially planar and the phenyl rings in the methoxyphenyl and methoxybenzoyl groups are not parallel to each other. The furan and phenyl rings are not coplanar. In the crystal, there are two weak CÐ HÁ Á ÁO-type intermolecular interactions. Comment

Crystal and molecular structure of 1‐allyl‐5‐(4‐methylbenzoyl)‐4‐(4‐methylphenyl)pyrimidine‐2(1H)‐thione

“…1). An equimolar mixture of the 2,3-furandione (0.50 g, 1.63 mmol), www.crt-journal.org easily obtained from oxalyl chloride and 1,3-bis(4-methylphenyl)propane-1,3-dione, similarly given in Reference [9,10], and N-allylthiourea (0.19 g, 1.63 mmol) were refluxed in 30 mL boiling benzene for 4 h. After evaporation of the solvent, the oily residue was treated with a dry diethyl ether/methanol (2:1) solution to give a yellow precipitate of the compound, which was filtered off and recrystallized from acetic acid and dried on P 2 O 5 . M.p.…”

Experimental and theoretical studies on the functionalization reactions of 4-benzoyl-1,5-diphenyl-1H-pyrazole-3-carboxylic acid and-acid chloride with various aminophenols

“…Method II: From 1H-pyrazole-3-carboxylic acid chloride (2) Appropriate amounts of the acid chloride 2 (0.50 g, 1.30 mmol) and the corresponding aminophenol derivatives 3 (molar ratio 1:1) were dissolved in benzene or toluene and refluxed with no catalytic amounts of pyridine for 5-7 h. Then the solution was cooled to room temperature and the corresponding reaction products 4 were obtained after evaporation of the solvent and triturating with diethyl ether or petroleum ether. After suction filtration the crude products 4 either were recrystallized from the suitable alcohol or washed carefully with nonpolar solvents and dried.…”

“…The cyclocondensation reaction of 1,3-diones (diaroylmethanes) with oxalyl chloride represents a convenient synthesis of furan-2,3-dione systems [1,2] belonging to an important group of oxygen-containing heterocyclic starting materials that has in general been widely explored during the last few decades [3,4]. On the other hand, 2,3-dihydrofuran-2,3-diones have been used successfully in the syntheses of various heterocycles for a long time [5].…”

Reactions of 4-(4-Methylbenzoyl)-5-(4-Methylphenyl)-2,3- Furandione With Semi-/Thiosemi-Carbazones

“…The 4-aroyl-5-aryl-2,3-dihydro-2,3-furandiones are obtained starting from 1,3-dicarbonyl compounds with oxalyl halides'" 5 . In general, 2,3-furandiones are considered convenient and versatile synthons in heterocyclic synthesis.…”