Various 4 - acetyl sydnones (2) can be prepared by reaction of the corresponding 3-aryl sydnones (1) with acetic anhydride at ∼110 °C promoted by N-Bromosuccinimide (NBS) as an effective reagent for acylation of sydnones under neutral conditions in satisfactory yields.
在 N-
溴代琥珀
酰亚胺 (
NBS) 作为一种有效试剂在中性条件下酰化 sydones 的促进下,相应的 3-arylsydones (1) 与
乙酸酐在 ∼110 °C 下反应,可以制备各种 4-乙酰 sydones (2)在令人满意的产量。