Synthesis of 2-phenylnaphthalenes from styryl-2-methoxybenzenes
作者:Ramesh Mudududdla、Rohit Sharma、Sheenu Abbat、Prasad V. Bharatam、Ram A. Vishwakarma、Sandip B. Bharate
DOI:10.1039/c4cc05151c
日期:——
A new simple and efficient method for the synthesis of 2-phenylnaphthalenes from electron-rich 1-styryl-2-methoxybenzenes has been described. The reaction proceeds via TFA catalyzed C-C bond cleavage followed by intermolecular [4+2]-Diels-Alder cycloaddition of an in situ formed styrenyl trifluoroacetate intermediate. The quantum chemical calculations identified the transition state for the cycloaddition
We report a straightforward, metal-free, efficient protocol for the synthesis of 2-phenylnaphthalenes from 1-phenylethane-1,2-diols under mild conditions. In this strategy, 1,1,1,3,3,3-hexafluoro-2-propanol is used as a solvent that stabilizes the reaction intermediate. An in situ IR experiment revealed that the reaction proceeds through the formation of phenylacetaldehyde followed by a [4+2] Diels–Alder
我们报告了一种在温和条件下从 1-苯基乙烷-1,2-二醇合成 2-苯基萘的简单、无金属、有效的方案。在该策略中,1,1,1,3,3,3-六氟-2-丙醇用作稳定反应中间体的溶剂。原位 IR 实验表明,该反应通过苯乙醛的形成以及 [4+2] Diels-Alder 反应进行。进行了几个对照实验以获得对反应的机理见解。
Unexpected formation of substituted naphthalenes and phenanthrenes in a GaCl3 mediated dimerization–fragmentation reaction of 2-arylcyclopropane-1,1-dicarboxylates
作者:Roman A. Novikov、Anna V. Tarasova、Kyrill Yu. Suponitsky、Yury V. Tomilov
DOI:10.1016/j.mencom.2014.11.011
日期:2014.11
Dimethyl 2-arylcyclopropane-1,1-dicarboxylates on heating with GaCl3 undergo dimerization to afford arylnaphthalenes or phenanthrenes. A possible reaction mechanism including elimination of two dimethyl malonate molecules was proposed, dimethyl malonate gallium complex Ga3+[H2C(CO2Me)(2)}](3)(GaCl4-)(3) was isolated and characterized by X-ray diffraction analysis.