An investigation of the reaction of variously substituted oxazoles with Br2 in methanol revealed the formation of non-aromatic addition products. In general the presence of an aromatic substituent at the 4-position of oxazoles or the presence of a 4-methyl group if the 2-substituent is also aliphatic favors formation of 2,5-dimethoxy-3-oxazolines , while an aromatic substituent at the 2-position favors