Intramolecular Pd(II)-Catalyzed Aerobic Oxidative Amination of Alkenes: Synthesis of Six-Membered <i>N</i>-Heterocycles
作者:Zhan Lu、Shannon S. Stahl
DOI:10.1021/ol300030w
日期:2012.3.2
Use of a base-free Pd(DMSO)2(TFA)2 catalyst system enables the synthesis of six-membered nitrogen heterocycles via a Wacker-type aerobic oxidative cyclization of alkenes bearing tethered sulfonamides. Various heterocycles, including morpholines, piperidines, piperazines, and piperazinones, are accessible by this method.
Upon treatment with dimethyltitanium dichloride or trimethylaluminum in the presence of titanium tetrachloride, a hydrogen atom at the olefinic 4-position is replaced by a methyl group. Terminal homoallyl alcohols afford (E)-isomers. If the double bond is an internal one, the carbon chain (at the other side of the hydroxy group) leaves its original position to the entering methyl group and switches to the other one at the same carbon atom.
Electrochemical Additions of the Allyl and the Benzyl Groups of Allyl and Benzyl Halides to Acetone
作者:Shohei Satoh、Hiroshi Suginome、Masao Tokuda
DOI:10.1246/bcsj.56.1791
日期:1983.6
hexamethylphosphoric triamide containing 0.5 M tetrabutylammonium perchlorate gave an addition product, 2-methyl-4-penten-2-ol, in a 53% yield. Allyl groups of 1-chloro-2-methyl-2-propene, 1-chloro-2-butene(3), 3-chloro-1-butene(4), 1-chloro-3-methyl-2-butene(5), and 3-chloro-3-methyl-1-butene(6), and benzyl groups of benzyl chloride, benzyl bromide, and 1-chloro-1-phenylethane can similarly be added to acetone by
The electrosynthesis of a wide range of alcohols from organichalides and ketones or aldéhydes is achieved under simple and mild conditions in an undivided electrolytic cell using different sacrificial anodes.