Synthesis of (3-Aroyl-2-aryl-4-hydroxy-5-oxo-2,5-dihydro-1H-pyrrol-1-yl)acetonitriles and Their Reaction with Hydrazine Hydrate
作者:V. L. Gein、E. A. Buldakova、M. V. Dmitriev
DOI:10.1134/s1070428019070054
日期:2019.7
iles. The reaction involved intermediate formation of Schiff base, followed by Michael-type addition of the dioxo ester to the C=N bond and cyclization of the addition product, methyl 3-aroyl-4-aryl-4-(cyanomethylamino)-2-oxobutanoate. The cyclization product reacted with hydrazine hydrate at the aroyl carbonyl group to give the corresponding hydrazone which was converted in 1,4-dioxane to the cyclic
在无水乙酸钠存在下,在冰醋酸中将4-芳基-2,4-二氧代丁酸甲酯与芳族醛和2-氨基乙腈硫酸盐的三组分反应得到先前未知的(3-aroyl-2-aryl-4-hydroxy- 5-氧代-2,5-二氢-1 H-吡咯-1-基)乙腈。该反应涉及席夫碱的中间形成,然后将二氧代酯的迈克尔型加成到C = N键上,并使加成产物3-芳酰基-4-芳基-4-(氰基甲基氨基)-2-氧代丁酸甲酯环化。 。环化产物在芳酰基羰基上与水合肼反应,生成相应的,将其转化为1,4-二恶烷为环状,[3,4-二芳基-6a-羟基-6-氧代-3a,4, 6,6a-四氢吡咯并[3,4- c ]吡唑-5(1 H)-基]乙腈,而无需消除第二个水分子。[3-芳基-2-芳基-4-羟基-5-氧代2,5-二氢-1 H-吡咯-1-基]乙腈与水合肼的反应是在沸腾的乙酸中进行的,[3通过最初形成的[3,4-二芳基-6a]脱水,获得了4-4-芳基-6-氧代-2