A one-pot method for the synthesis of azocompounds by the reaction of β-naphthol with aryl amines using t-BuONO as the nitrosonium source in DCM at room temperature was developed. This method feat...
Mesomorphism Dependence on Terminal/Lateral Substitution of Nonlinear Azoester Molecules
作者:H. R. Prajapati、A. V. Doshi
DOI:10.1080/15421406.2014.990198
日期:2015.7.24
Analytical and spectral data confirm the molecularstructures of homologues. Thermal stability for the nematic phase is 132.6°C, and the degree of mesomorphism varies between 34°C and 79°C and the series if of a middle-ordered melting type. An odd-even effect is observed for the N-I transition curve with alternation of transitiontemperatures. The LC behavior of the series is compared with other structurally
Synthesis of a nitrite functionalized star-like poly ionic compound as a highly efficient nitrosonium source and catalyst for the diazotization of anilines and subsequent facile synthesis of azo dyes under solvent-free conditions
star-like poly ionic (NFSPI) compound was synthesized and used as a highly efficient nitrosonium source and catalyst for the conversion of aniline derivatives to diazoniumsalts. Azo dyes were prepared via in situ azo-coupling reaction of these diazoniums with active aromatic compounds under solvent-free conditions in very short reaction time in excellent yields. NFSPI plays dual role as a three-dimensional
An electron‐ionization (EI) mass spectra of a series of 1‐arylazonaphthalen‐2‐ols was obtained for studying the substituenteffect on the fragmentation. The correlation between the ratio, molecular ion and fragment ion, and Hammett’s constants is applied to examine the effect of the substituent on the fragmentation. The negative correction between the ratio, Imolecular ion/(I171amu + I143amu + I115amu)
获得了一系列1-芳基氮杂萘-2-醇的电子电离(EI)质谱图,以研究取代基对碎片的影响。比率,分子离子和碎片离子之间的相关性以及Hammett常数用于检查取代基对碎片的影响。I分子离子/(I 171amu + I 143amu + I 115amu)之比与Hammett常数之间的负校正表示吸电子基团使分子离子不稳定。异常的远距离氢转移显示了在裂解过程中的重要作用
Crippa, G. B., Gazzetta Chimica Italiana, 1928, vol. 58, p. 716 - 726