Stereospecific dehydrative alkylation of bis-sulfones: synthesis of a lesser tea tortrix pheromone
摘要:
The intra- and intermolecular condensation of alcohols with bis-sulfone methylenes, i.e., dehydrative alkylation, using DEAD and Ph3P proceeds stereospecifically at room temperature under essentially neutral conditions affording good to excellent yields of alkylation/annulation products.
Electrooxidative coupling of salts of nitro compounds with halide, nitrite, cyanide, and phenylsulfinate anions
作者:A. I. Ilovaisky、V. M. Merkulova、Yu. N. Ogibin、G. I. Nikishin
DOI:10.1007/s11172-006-0007-7
日期:2005.7
salts of primary and secondary nitrocompounds (nitroethane, 1- and 2-nitropropanes, nitrocyclohexane, and nitrocycloheptane) in the presence of excess halide, nitrite, cyanide, and phenylsulfinate anions under undivided and divided amperostatic electrolysis conditions in a two-phase medium (CH2Cl2/H2O) produces geminal nitrohalides (35–85% yields), dinitro compounds (15–51%), nitronitriles (6–27%)
METHODS FOR PERFORMING ELECTROCHEMICAL NITRATION REACTIONS
申请人:Lister Tedd Edward
公开号:US20090038953A1
公开(公告)日:2009-02-12
A method for the electrochemical synthesis of dinitro compounds is disclosed. The method comprises using an anode to oxidize an inactive chemical mediator, such as a ferrocyanide (Fe(CN)
6
−4
) ion, to an active chemical mediator or oxidizing agent, such as a ferricyanide (Fe(CN)
6
−3
) ion, in the presence of a differential voltage. The oxidizing agent reacts with a nitro compound and a nitrite ion to form a geminal dinitro compound. The anode may continuously oxidize ferrocyanide to regenerate active ferricyanide, thus keeping sufficient amounts of ferricyanide available for reaction.