1,2-Benzoxathiin-4(3<i>H</i>)-one 2,2-dioxide – new enol nucleophile in three-component interaction with benzaldehydes and active methylene nitriles
作者:Galyna V. Grygoriv、Dmitry A. Lega、Valentin P. Chernykh、Lucjusz Zaprutko、Andrzej K. Gzella、Anna Pawełczyk、Leonid A. Shemchuk
DOI:10.1039/c8ra06801a
日期:——
pathways leading to these products. The salts were obtained for the first time. The preparative method for the synthesis of triethylammonium salts of 3,3′-(arylmethylene)bis(4-hydroxybenzo[e][1,2]oxathiine 2,2-dioxides) was proposed by the direct interaction of 1,2-benzoxathiin-4(3H)-one 2,2-dioxide with arenecarbaldehydes. The application of ammonium acetate as a catalyst allowed us to synthesize
1,2-benzoxathiin-4(3 H )-one 2,2-dioxide 的反应性首次在多组分反应中进行了研究,即在与活性亚甲基腈和芳香醛的三组分相互作用中,以构建缩合的 2-氨基-4 H-吡喃衍生物。反应结果很大程度上取决于活性亚甲基腈和芳烃甲醛的性质。丙二腈的应用产生了新的 2-amino-4-aryl-4 H - pyrano[3,2- c][1,2]benzoxathiine-3-carbonitrile 5,5-dioxides 在大多数情况下,而氰基乙酸乙酯的使用导致产品的复杂混合物。在最后一种情况下,根据所使用的芳烃甲醛分离出三种不同的产品,即 2-氨基-4-芳基-4 H-吡喃并[3,2 - c ][1,2]苯并氧噻吩-3-羧酸乙酯 5,5 -二氧化物、2-氰基-3-芳基丙烯酸乙酯和 3,3'-(芳基亚甲基)双(4-羟基苯并[ e ][1,2]氧杂硫胺 2,2-二氧化物)的盐。尝试分别获得乙基