28924-21-2Relevant articles and documents
Design, synthesis, and properties of nonlinear optical chromophores based on a verbenone bridge with a novel dendritic acceptor
Sun, Hejing,Li, Zhong'An,Wu, Jieyun,Jiang, Zhenhua,Luo, Jingdong,Jen, Alex K.-Y.
, p. 2840 - 2847 (2018)
Two novel second order nonlinear optical (NLO) chromophores based on N,N-diethylaniline as a donor, verbenone based tetraene as a bridge, and tricyanofuran (TCF) or tricyanofuran derivatives with a dendritic moiety as an acceptor have been synthesized in good overall yields and systematically characterized. Besides, a facile applicable synthetic approach for a NLO dendritic acceptor was developed. Compared with C7, after introducing dendritic derivative steric hindrance groups into the acceptor, chromophore C8 had good thermal stabilities with high thermal decomposition temperatures which were 33 °C higher than that of chromophore C7. At the same time, cyclic voltammetry (CV) experiments were performed to determine the different redox properties. The conjugated verbenone tetraene segments in two chromophores could significantly improve the glass-forming ability and molecular polarization of chromophores as revealed by UV-vis-NIR absorption measurements. The bulky dendritic moiety linked by a short C-C bond is closer to the TCF acceptor, which is the most polar part in the chromophore, compared to conventional isolation groups. The results obtained from electro-optic (EO) coefficients indicate that this TCF acceptor with a unique dendritic structure can prevent antiparallel packing between chromophores, improving the poling efficiency and enhancing the EO performance. These properties, together with the good solubility, suggest the potential use of these new chromophores as materials for advanced photonic devices.
Preparation method of terbutaline sulfate (by machine translation)
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Paragraph 0032-0036; 0047-0051, (2020/04/17)
The method adopts,hydroxyacetophenone as the starting material 3,5 - to obtain, di 3,5 -benzyloxyacetophenone, 3,5 - dibenzyloxyacetophenone and then generates, DMSO-benzyloxy 3,5 -phenyl,tert-butylamino 1 - [3,5 - ethanol (by hydrogenation debenzil) and sulfuric acid into a salt to obtain dibenzyloxybenzenethanone aldehyde] - 2 - (and then reductive amination with tertiary butylamine.) reaction conditions under, reaction conditions, are avoided, The method disclosed by the invention is cheap and easy to obtain and avoids the use of high-risk highly-toxic agents, by reductive amination . The method disclosed by the invention is low, reaction conditions . The method disclosed by the invention is cheap and easily available. (by machine translation)
A synthesis method of terbutaline sulfate (by machine translation)
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Paragraph 0040-0043, (2018/10/04)
The invention provides a method for synthesis of terbutaline sulfate, the specific synthetic route is: to 3, 5 - dihydroxy acetophenone as raw materials, after phenmethyl protection, oxidation, esterification, reduction ammoniation, debenzylation, finally with sulfuric acid to form the salt to obtain the terbutaline sulfate. The invention provides a preparation method of the terbutaline sulfate, the beneficial effect that: 1, using dimethyl sulfoxide (DMSO) to replace the two connecting selenium dioxide, avoid the use of high-risk reagent, safety and high efficiency; 2, [...] process, small pollution to the environment; 3, the operation is simple, mild reaction conditions, the step is short, low cost, is more suitable for industrial production. (by machine translation)