A NOVEL SYNTHESIS OF SOME MIXED ARYLMETHYL–ALKYL ETHERS
作者:K. G. Rutherford、O. A. Mamer、J. M. Prokipcak、R. A. Jobin
DOI:10.1139/v66-350
日期:1966.10.1
During an investigation into the synthesis of optically active trityl systems, it was found that triphenylcarbinol could be converted into its methyl ether in an excellent yield by treatment with iodine in methanol. Although the reaction appeared to be an obvious one, a survey sho~ved that such a procedure had not as yet been recorded in the literature. I t became of interest, then, to study this ether-forming
在对光学活性三苯甲基系统合成的研究中,发现通过用甲醇中的碘处理,可以将三苯基甲醇以极好的收率转化为其甲基醚。尽管反应似乎很明显,但一项调查表明,文献中尚未记录这种程序。于是,研究这种与其他芳基甲醇的醚形成反应就引起了人们的兴趣,这些芳基甲醇在我们的实验室中已经可用。表 I 显示了通过该程序合成的混合醚。尽管用标准硫代硫酸钠滴定表明碘是一种催化剂,但当它以大约等摩尔量使用时获得了最好的结果。将芳基甲醇溶解在丙酮和脂肪醇的混合物中,加入碘,
Dialkyl Ether Formation by Nickel‐Catalyzed Cross‐Coupling of Acetals and Aryl Iodides
作者:Kevin M. Arendt、Abigail G. Doyle
DOI:10.1002/anie.201503936
日期:2015.8.17
A new substrate class for nickel‐catalyzed C(sp3) cross‐coupling reactions is reported. α‐Oxy radicals generated from benzylic acetals, TMSCl, and a mild reductant can participate in chemoselective cross‐coupling with aryliodides using a 2,6‐bis(N‐pyrazolyl)pyridine (bpp)/Ni catalyst. The mild, base‐free conditions are tolerant of a variety of functional groups on both partners, thus representing
Photolysis of Tetraarylmethanes and 3-(Triarylmethyl)pyridines
作者:Min Shi、Yoshiki Okamoto、Setsuo Takamuku
DOI:10.1246/bcsj.63.2731
日期:1990.9
Upon UV irradiation in benzene–methanol (1:2) tetraarylmethanes or 3-(triarylmethyl)pyridines underwent an α,α-elimination of two aryl groups to give biaryls or 3-arylpyridine, and two corresponding carbene intermediates. The latters afforded methyl ethers by the O–H insertion to methanol.
Simple and Direct sp<sup>3</sup> C–H Bond Arylation of Tetrahydroisoquinolines and Isochromans via 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone Oxidation under Mild Conditions
作者:Wataru Muramatsu、Kimihiro Nakano、Chao-Jun Li
DOI:10.1021/ol401534g
日期:2013.7.19
The 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-mediated sp3C–Hbondarylation of tetrahydroisoquinolines and isochromans is described. The corresponding products were facilely synthesized via a simple nucleophilic addition reaction between readily available aryl Grignard reagents and iminium (or oxonium) cations generated in situ by DDQ oxidation of tetrahydroisoquinolines (or isochromans) under
Organocatalytic Approach for C(sp<sup>3</sup>)–H Bond Arylation, Alkylation, and Amidation of Isochromans under Facile Conditions
作者:Wataru Muramatsu、Kimihiro Nakano
DOI:10.1021/ol5006399
日期:2014.4.4
the synthesis of isochroman derivatives via direct C(sp3)–H bond arylation is described. The oxidation reaction with [bis(trifluoroacetoxy)iodo]benzene facilitates the regeneration of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in the C(sp3)–H bond arylation of isochroman. The reaction conditions can also be used for alkyl Grignard reagents and amides to afford the corresponding isochroman derivatives.