Synthesis of 2-Nitro- and 2,2‘-Dinitrobiphenyls by Means of the Suzuki Cross-Coupling Reaction
作者:Raquel Rodríguez González、Lucia Liguori、Alberto Martinez Carrillo、Hans-René Bjørsvik
DOI:10.1021/jo051589t
日期:2005.11.1
Mechanistic investigations and protocols for the synthesis of 2-nitrobiphenyls and 2,2'-dinitrobiphenyls are disclosed. It is revealed that obstacles appear during the transmetalation step when the phenylboronic acid is substituted with a nitro group in the 2-position, whereas when substituted in the 3- or 4-positions, the reaction follows similar patterns as found in the electrophilic substitution of nitrobenzenes, an observation that may be attributed to the elimination step of the catalytic cycle.