Reactions of 3-cyclopropyl-3-oxopropionitrile anion generated by electroreduction of 5-cyclopropylisoxazole
作者:V. A. Petrosyan、S. V. Neverov、V. L. Sigacheva
DOI:10.1007/s11172-007-0343-2
日期:2007.11
tetrabutylammonium salt of 3-cyclopropyl-3-oxopropionitrile gave O-acylation products, whereas the reaction with its sodium salt gives C-acylation products. The reactions of these salts with hydroxylamine hydrochloride follow a different route: in the case of the tetrabutylammonium salt, resinification takes place, while in the case of the sodium salt, 5-amino-3-cyclopropylisoxazole is formed. The condensation
摘要 以5-环丙基异恶唑在非质子介质中阴极还原得到的3-环丙基-3-氧代丙腈阴离子为例,证明氰基酮阴离子具有双重反应性。乙酰氯与电生成的 3-环丙基-3-氧代丙腈四丁基铵盐反应得到 O-酰化产物,而与其钠盐反应得到 C-酰化产物。这些盐与盐酸羟胺的反应遵循不同的路线:在四丁基铵盐的情况下,发生树脂化,而在钠盐的情况下,形成 5-氨基-3-环丙基异恶唑。该产物与 4,4,4-三氟-1-(2-噻吩基)丁烷-1,3-二酮在冰醋酸中缩合得到 3-环丙基-6-(2-噻吩基)-4-(三氟甲基)异恶唑并[5,4-b]吡啶,产率为85%。