The reaction of 2,6-dimethyl-4-methoxybenzyl alcohols, ethyl ethers, and acetates, possessing electrondonating and -withdrawing groups at the benzylic position, with bromine water was studied at different temperatures. The reaction was strongly affected by the electronegativity of a benzyl substituent to afford bromination products of aromatic nuclei and 2,4-dibromo-3,5-dimethylmethoxybenzene along
Reaction of 2,6-dimethyl-4-methoxybenzaldehyde with methylmagnesium iodide and some properties of the reaction products
作者:T. Kamikawa、M. Nakatani、T. Kubota
DOI:10.1016/0040-4020(68)88112-8
日期:1968.1
and 1B), instead of the desired 1-(2,6-dimethyl-4-methoxyphenyl)ethanol. The NMR spectra of the high-melting isomer (1B) showed the presence of hindered rotation of aromatic Me groups. The reactions and properties of these ethers and other related ethers were examined.
Hindered organoboron groups in organic chemistry. 27. Preparations and some properties of alkylbis(2,6-dimethyl-4-methoxyphenyl)boranes ((DMP)2BR)
作者:Andrew Pelter、Robert Drake
DOI:10.1016/s0040-4020(01)85689-1
日期:1994.1
the corresponding hydroborate. Attempts to isolate (DMP)2BH were unsuccessful but the borane was readily trapped with alkynes, yielding alkenylboranes. The allyl derivative, (DMP)2BAllyl, was made and some of its reactions were investigated.
Electrophilic aryl-halogenation using N-halosuccinimides under ball-milling
作者:Anima Bose、Prasenjit Mal
DOI:10.1016/j.tetlet.2014.02.064
日期:2014.3
We report here a methodology of chemo- and regio-selective aryl bromination and iodination using respective N-halosuccinimides at room temperature in the absence of any solvents, catalyst/additives under ball-milling condition. However, for chlorination ceric ammonium nitrate was used as additive. The coupled product succinimide, produced from the reactions, was recycled via regeneration of NBS. This methodology works with the electron-donor substituted or unsubstituted arenes. (C) 2014 Elsevier Ltd. All rights reserved.
v. Auwers, Justus Liebigs Annalen der Chemie, 1920, vol. 421, p. 57