Continuous Platform To Generate Nitroalkanes On-Demand (in Situ) Using Peracetic Acid-Mediated Oxidation in a PFA Pipes-in-Series Reactor
作者:Sergey V. Tsukanov、Martin D. Johnson、Scott A. May、Stanley P. Kolis、Matthew H. Yates、Jeffrey N. Johnston
DOI:10.1021/acs.oprd.8b00113
日期:2018.8.17
of peroxides and nitroalkanes. The subsequent continuous extraction generates a solution of purified nitroalkane, which can be directly used in the following enantioselective aza-Henry chemistry to furnish valuable chiral diamine precursors with high selectivity, thus completely avoiding isolation of the potentially unsafe low-molecular-weight nitroalkane intermediate. A continuous campaign (16 h) established
resulting from this process are obtained in high yields and are analytically pure, i.e., they do not require distillation or further purification, which is a comfortable improvement of the ancestral VictorMeyer reaction.
Palladium-Catalyzed Nitromethylation of Aryl Halides: An Orthogonal Formylation Equivalent
作者:Ryan R. Walvoord、Simon Berritt、Marisa C. Kozlowski
DOI:10.1021/ol301713j
日期:2012.8.17
An efficient cross-coupling reaction of arylhalides and nitromethane was developed with the use of parallel microscale experimentation. The arylnitromethane products are precursors for numerous useful synthetic products. An efficient method for their direct conversion to the corresponding oximes and aldehydes in a one-pot operation has been discovered. The process exploits inexpensive nitromethane
Cyclopentadienyliron-mediated introduction of functionalized alkyl or alkynyl groups to arenes in an addition—demetallation sequence
作者:Ronald G. Sutherland、Chunhao Zhang、Adam Piórko
DOI:10.1016/0022-328x(91)80248-i
日期:1991.1
cyanomethyl, and phenylethynyl anions add selectively ortho to arenes containing electron-witdrawing groups and complexed with cyclopentadienyliron. Under similar reaction conditions anions such as alkyl, dichloromethyl and trichloromethyl add in a non-selective way. Addition of the trichloromethyl anion is thermodynamically controlled at extended reaction times and, due to the size of the anion, the
The first catalytic oxidation of aryl oximes to nitro compounds by means of methyltrioxorhenium and urea hydroperoxide is reported. The formation of carbamates, probably occurring through formation of nitrile oxide intermediates, has been observed from 2,6-disubstituted aryl oximes.