trifluoromethanesulfonic acid (TfOH) or bis(trifluoromethane-sulfonyl)imide (Tf2NH), iodosobenzene (PhI=O) efficiently promoted the reactions of dicarbonyl compounds as well as monocarbonyl compounds with nitriles to give 2,4-disubstituted and 2,4,5-trisubstituted oxazole in a single step under the mild conditions.
在
三氟甲磺酸 (TfOH) 或双(三
氟甲磺酰基)
酰亚胺 (Tf2NH) 存在下,
碘代苯 (PhI=O) 有效地促进了二羰基化合物以及单羰基化合物与腈的反应,生成 2,4-二取代和 2 ,4,5-三取代
恶唑在温和条件下一步完成。