Potassium Trinitromethanide as a 1,1-Ambiphilic Synthon Equivalent: Access to 2-Nitroarenofurans
作者:Vitaly A. Osyanin、Dmitry V. Osipov、Maxim R. Demidov、Yuri N. Klimochkin
DOI:10.1021/jo402543s
日期:2014.2.7
The first example of the use of potassium trinitromethanide as a 1,1-ambiphilic synthon equivalent for the construction of a benzofuran moiety mediated by triethylamine has been developed. The method tolerates a variety of functional groups on the starting quaternary ammonium salt and has been successfully extended to polysubstituted benzofurans. Formation of an o-quinone methide intermediate is postulated as a key to the mechanism of this cascade process.
TROMELIN, A.;DEMERSEMAN, P.;ROYER, R., SYNTHESIS, BRD, 1985, N 11, 1074-1076
作者:TROMELIN, A.、DEMERSEMAN, P.、ROYER, R.
DOI:——
日期:——
TROMELIN A.; DEMERSEMAN P.; ROYER R.; GAYRAL PH.; FOURNIAT J., EUR. J. MED. CHEM., 21,(1986) N 5, 397-402
作者:TROMELIN A.、 DEMERSEMAN P.、 ROYER R.、 GAYRAL PH.、 FOURNIAT J.
DOI:——
日期:——
An Improved Synthesis of 2-Nitrobenzo[<i>b</i>]furans
作者:Anne Tromelin、Pierre Demerseman、René Royer
DOI:10.1055/s-1985-31435
日期:——
2-Nitrobenzo[b]furans 4 are prepared in improved yields by reacting o-hydroxybenzaldehydes 1 and bromonitromethane (2) at low temperature in order to avoid the dehydration of the aldol intermediate 3 in the alkaline condensation medium. This aldol 3 is then quantitatively dehydrated by heating in acetic anhydride.