erythro-Selective conjugate addition of benzeneselenol to (E)-nitroalkenes and subsequent syn-elimination of benzeneselenenic acid provide a new method for the conversion of (E)-nitroalkenes into (Z)-nitroalkenes.
Facile and Highly Stereoselective One-Pot Synthesis of Either (<i>E</i>)- or (<i>Z</i>)-Nitro Alkenes
作者:Stefania Fioravanti、Lucio Pellacani、Paolo A. Tardella、Maria Cecilia Vergari
DOI:10.1021/ol800224k
日期:2008.4.1
of catalytic amounts of piperidine over 4 A molecular sieves. Simply by changing reaction conditions (solvent and temperature) it is possible to control the stereochemical outcome of the reactions, obtaining pure (E)- and (Z)-nitro alkenes in high to excellent yields. The role of molecular sieves on the stereochemical control seems crucial in addition to that of piperidine, especially for the synthesis