Regioselective metalation of 2-phenyloxazolo[4,5-b]pyridines and -[5,4-b]pyridines: Functionalization at the 7-position

Article abstract of DOI:10.1055/s-1992-26242

2-Phenyloxazolo[4,5-b]pyridines 1 and -[5,4-b]pyridines 4 were functionalized at the 7-position with various electrophiles in good yield. The secondary alcohols 3a,b and 6a,b were oxidized to the corresponding ketones 7a,b and 8a,b with manganese dioxide