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.
Baker et al., Journal of the Chemical Society, 1958, p. 2658,2662
作者:Baker et al.
DOI:——
日期:——
949. Polycyclic cinnoline derivatives. Part XI. The nitration of benzo[c]cinnoline and some methylbenzo[c]cinnolines, and the ultraviolet absorption of derived amines