作者:Uvarova, Ekaterina S.、Kutasevich, Anton V.、Lipatov, Egor S.、Pytskii, Ivan S.、Raitman, Oleg A.、Selivantev, Yuriy M.、Mityanov, Vitaly S.
DOI:10.1039/d4ob00353e
日期:——
A three-component condensation of 2-unsubstituted imidazole N-oxides, 3-ketonitriles, and aldehydes is described. The reaction proceeds via sequential Knoevenagel condensation/Michael addition under mild, catalyst-free conditions with various substrates. Furthermore, the corresponding 2-functionalized imidazole N-oxides can be further dehydrated to (Z)-2-aroyl-3-(1H-imidazol-2-yl)-acrylonitriles, which
描述了2-未取代的咪唑N-氧化物、3-酮腈和醛的三组分缩合。该反应通过连续的克诺文格尔缩合/迈克尔加成在温和、无催化剂的条件下与各种底物进行。此外,相应的2-官能化咪唑N-氧化物可以进一步脱水为( Z )-2-芳酰基-3-( 1H-咪唑-2-基)-丙烯腈,也可以通过改变反应条件直接制备作为克诺文格尔缩合/迈克尔加成/脱水的级联。