2904-59-8Relevant academic research and scientific papers
Synthesis, antimicrobial and antioxidant activities of 2-isoxazoline derivatives
Abu-Orabi, Sultan,Al-Momani, Loay,Al-Qudah, Mahmoud,Alshamari, Asma,Hamadeh, Fedaa
, (2020/10/02)
A series of derivatives of trans-3-(2,4,6-trimethoxyphenyl)4,5-dihydroisoxazolo-4,5-bis[carbonyl-(40phenyl)thiosemicarbazide (9) and of trans-3-(2,4,6-trimethoxyphenyl)-4,5-dihydro isoxazolo-4,5-bis(aroylcarbohydrazide) (10a–c) were synthesized
Trifluoromethanesulfonyloxy-group-directed regioselective (3 + 2) cycloadditions of benzynes for the synthesis of functionalized benzo-fused heterocycles
Ikawa, Takashi,Kaneko, Hideki,Masuda, Shigeaki,Ishitsubo, Erika,Tokiwa, Hiroaki,Akai, Shuji
supporting information, p. 520 - 526 (2015/02/05)
Highly regioselective (3 + 2) cycloadditions of (trifluoromethanesulfonyloxy)benzynes [(triflyloxy)benzynes] with 1,3-dipoles followed by cross-coupling reactions provided multisubstituted benzo-fused heterocycles. The triflyloxy group at the 3-position of benzynes, and even that at the remote 4-position, greatly affected the regiocontrol of the cycloaddition. These groups also served to install other substituents at their ipso-positions.
Novel synthesis of 3,4-diarylisoxazole analogues of valdecoxib: Reversal cyclooxygenase-2 selectivity by sulfonamide group removal
Di Nunno, Leonardo,Vitale, Paola,Scilimati, Antonio,Tacconelli, Stefania,Patrignani, Paola
, p. 4881 - 4890 (2007/10/03)
3,4-Diarylisoxazole analogues of valdecoxib [4-(5-methyl-3-phenylisoxazol- 4-yl)-benzensulfonamide], a selective cyclooxygenase-2 (COX-2) inhibitor, were synthesized by 1,3-dipolar cycloaddition of arylnitrile oxides to the enolate ion of phenylacetone regioselectively prepared in situ with lithium diisopropylamide at 0 °C. The corresponding 3-aryl-5-methyl-4-phenyl- isoxazoles were easily generated by a dehydration/aromatization reaction under basic conditions of 3-aryl-5-hydroxy-5-methyl-4-phenyl-2-isoxazolines and further transformed into their benzenesulfonamide derivatives. The biochemical COX-1/COX-2 selectivity was evaluated in vitro by using the human whole blood assays of COX isozyme activity. Three compounds not bearing the sulfonamide group present in valdecoxib were selective COX-1 inhibitors.
Enthalpies of combustion of 2,4,6-trimethylbenzonitrile, 2,4,6-trimethylbenzonitrile N-oxide, 2,6-dimethylbenzonitrile, 2,4,6-trimethoxybenzonitrile, and 2,4,6-trimethoxybenzonitrile N-oxide: the dissociation ethalpies of the (N-O) bonds
Acree, W. E.,Tucker, Sheryl A.,Zvaigzne, Anita I.,Meng-Yan, Yang,Pilcher, G.,Ribeiro da Silva, Maria D. M. C.
, p. 31 - 36 (2007/10/02)
The standard (pdeg = 0.1 MPa) molar enthalpies of combustion at 298.15 K were measured by static-bomb calorimetry and the standard molar enthalpies of sublimation at 298.15 K were measured by microcalorimetry for the following aromatic nitriles and aromatic nitrile N-oxides: .From the standard molar enthalpies of formation of the gaseous compounds, the molar dissociation enthalpies of the (N-O) bonds were derived: D(N-O)/(kJ*mol-1): trimethylbenzonitrile N-oxide, (222.2 +/- 4.6); trimethoxybenzonitrile N-oxide, (232.8 +/- 3.8).
1,3-Dipolar Cycloaddition of Nitrile Oxides to N-Vinylcarbazole: Regioselective Formation of 5-(9-Carbazolyl)-Δ2-Isoxazolines
Rao, K. Rama,Nageswar, Y. V. D.,Sattur, P. B.
, p. 255 - 256 (2007/10/02)
Aryl substituted nitrile oxides undergo 3 + 2 cycloaddition to N-vinylcarbazole to afford only one regioisomer, i.e., 3-aryl sustituted 5-(9-carbazolyl)-Δ2-isoxazolines III in good yield.
