作者:Alfred Hassner、Bilha Fischer
DOI:10.1016/s0040-4020(01)85135-8
日期:1989.1
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
对各种取代的恶唑与Br 2在甲醇中反应的研究表明,形成了非芳香族加成产物。通常,在恶唑的4-位存在芳族取代基或在2-取代基也是脂肪族的情况下存在4-甲基则有利于2,5-二甲氧基-3-恶唑啉的形成,而芳族取代基位于2,5-二甲氧基-3-恶唑啉。 2位有利于形成开环酰胺或4,5-二甲氧基-2-恶唑啉。通过在1 H-和13 C-NMR中溴化CD 3 OD之后,可以获得有关这些反应中中间体的重要信息。