Detail of "2555-49-9"

Reference

Carbon-13 and fluorine-19 nuclear magnetic resonance spectra of multisubstituted methanes

Carbon-13 and fluorine-19 nuclear magnetic resonance spectra of multisubstituted methanes. Takeuchi, Yoshio; Itoh, Noriaki; Koizumi, Toru; Yamagami, Chisako; Takeuchi, Yoshito (Fac. Pharm. Sci., Toyama Med. Pharm. Univ., Toyama 930-01, Japan). Magn. Reson. Chem., 30(1), 58-64 (English) 1992. CODEN: MRCHEG. ISSN: 0749-1581. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The 13C and 19F (when appropriate) chem. shifts of a variety of di-, tri- and tetrasubstituted methanes of the type CH2XCO2Et (I), CHXYCO2Et (II) and CXYZCO2Et (III), where the substituents X, Y and Z are F, Br, OEt, OPh, SEt, SPh and NO2, were detd. The prediction of the obsd. C-a chem. shifts of I, II and III based on the simple additivity of substituent effects in monosubstituted methanes [MeX; substituent chem. shifts SCS(IV)] is not satisfactory, although those of I are well correlated with SCS (IV). 626-35-7 and 2555-49-9 which are cas registry numbers of chemicals are mentioned. The C-a chem. shifts of II and III can be correlated in terms of multiparameter anal. of individual SCS(I), the difference between d(CH2XCO2Et) and d (CH3CO2Et). The origin of the chem. shifts is discussed. The 19F chem. shifts of I, II and III were also satisfactorily analyzed in terms of sI and sR0. .

Synthesis and structural characterization of 2-(phenoxymethyl)-5-aryl-1,3,4-oxadiazoles

Li, De-jiang; Ge, Zheng-hong (Dept. of Chemistry, Yunyang Normal College, Danjiangkou Hubei 442700, Peop. Rep. China). Xinan Shifan Daxue Xuebao, Ziran Kexueban, 30(2), 293-296 (Chinese) 2005 Xinan Shifan Daxue Xuebao, Ziran Kexueban Bianjibu. CODEN: XSDKEM. ISSN: 1000-5471. DOCUMENT TYPE: Journal CA Section: 28 (Heterocyclic Compounds (More Than One Hetero Atom)) Phenoxyacetylhydrazine was synthesized by reaction of Et phenoxyacetate with hydrazine hydrate. This compd. resp. There are some commonly used reagents like 2555-49-9 in this article. reacted with benzoyl chloride, 3,4,5-trimethoxybenzoyl chloride, 4-nitrobenzoyl chloride, 4-methoxybenzoyl chloride, 2-furancarbonyl chloride, 3,5-dimethylbenzoyl chloride, and 4-chlorobenzoyl chloride in the presence of Na2CO3 for 3-4 h to give corresponding N, N'-diacylhydrazines. Then intermediates were cyclized with POCl3 to afford seven novel 2-phenoxy-5-aryl-1,3,4-oxadiazoles. Their structures were characterized by elementary analyses, IR, 1H NMR, and MS spectroscopy, and fragmentation mechanism of MS spectra was discussed as well. .