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41.
42.
-Halonitrosoalkanes react with resorcinol as nitrosylating agents to form 3-hydroxy-N-(2,4-dihydroxyphenyl)-1,4-quinone imine.Translated fromIzvestiya Akademioi Nauk. Seriya Khimicheskaya, No. 3, pp.773–774, March, 1996. 相似文献
43.
高效液相色谱法测定皮炎宁酊中间苯二酚和水杨酸的含量 总被引:16,自引:0,他引:16
采用高效液相色谱法测定了皮炎宁酊中间苯二酚和水杨酸的含量。色谱柱为HypersilODS柱,流动相为V(甲醇)∶V(水)∶V(乙酸)=50∶50∶0.9。检测波长为285nm。在此条件下,间苯二酚和水杨酸可与其降解产物及杂质完全分开。 相似文献
44.
E. V. Bartashevich P. V. Plekhanov G. L. Rusinov V. A. Potemkin A. V. Belik O. N. Chupakhin 《Russian Chemical Bulletin》1999,48(8):1553-1557
A method was proposed for estimating the possibility of cyclization of adducts of resorcinol with pyrimidines to form oxadiazocines
based on the conformational criterion and analysis of charges on the C(5) atom of the pyrimidine ring and on the H atom of
the hydroxy group of the resulting adducts. A series of new derivatives of 4,5-dihydro-11H-5,11-methanobenzo[g]azolo[1,3,5]oxadiazocines were synthesized.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1573–1577, August, 1999. 相似文献
45.
在磷酸介质中,痕量间苯二酚对高碘酸钾氧化吡咯红Y使其荧光猝灭具有抑制作用,据此建立了动力学荧光法测定痕量间苯二酚的新方法.方法的线性范围为3.0~45 ng/mL,检出限为1.2 ng/mL.用于测定合成样及药物中间苯二酚的含量,回收率为94.6%~104%. 相似文献
46.
47.
Matthew Laskoski Dawn D. Dominguez Teddy M. Keller 《Journal of polymer science. Part A, Polymer chemistry》2006,44(15):4559-4565
New multiple aromatic ether containing oligomeric cyanate ester resins have been synthesized using a modified Ullmann reaction. The oligomeric monomers were prepared by reacting resorcinol and 1,3‐ or 1,4‐dibromobenzene in the presence of potassium carbonate and a catalytic amount of a copper(I) complex in a N,N‐dimethylformamide/toluene mixture. The hydroxyl terminated intermediates were end‐capped with the cyanate moiety by reaction with cyanogen bromide in the presence of triethylamine in dry acetone. The oligomeric cyanate ester monomers are liquid at room temperature, which enhance their processability to polymeric networks. The thermo‐oxidative properties were determined for the new cyanate ester polymers as well as their storage modulus. The length of the aromatic ether spacer between the terminal cyanate ester groups was varied to investigate the effect of changing the spacer length on the properties of the material. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 4559–4565, 2006 相似文献
48.
The characteristic factors of the gallium and vanadium chelates with the ligands 4(2pyridylazo)resorcinol (PAR) and xylenol orange (XO) have been determined with the aid of the principle of correction, which makes it possible to eliminate the influence of the surplus ligand in the solution of its chelate with methane (which makes calculation easier) and thereby provides a more acceptable method in comparison with others. The real molar coefficients of extinction of the chelates Ga and V with PAR and XO have been determined and a detailed calculation of the stoichiometric ratios of chelates has been made. The results have shown that the chelates formed have the following structure: Ga(PAR), Ga(XO), V(PAR)2, and V(XO). 相似文献
49.
以血红素为原料 ,用间苯二酚作还原剂 ,将血红素还原为亚血红素 ,并用硅胶柱分离纯化 ,得到纯品亚血红素 .此种分离纯化方法简单 ,快速 ,得到的亚血红素纯度较高 ,可以为有机合成提供高纯度的原材料 相似文献
50.