Effective Synthesis of 3,4-Diaryl-isoxazole-5-carboxamides and their Antiproliferative Properties
作者:Anna S. Maksimenko、Victor P. Kislyi、Natalia B. Chernysheva、Yuri A. Strelenko、Yan V. Zubavichus、Victor N. Khrustalev、Marina N. Semenova、Victor V. Semenov
DOI:10.1002/ejoc.201900643
日期:2019.7.14
3,4‐Diaryl‐isoxazole‐5‐carboxamides 6, structural analogues of heat shock protein inhibitors, were obtained by a simple scalable rearrangement of intermediate 3,4‐diaryl‐5‐carboxamido‐isoxazoline N‐oxides 5. In contrast, base‐catalyzed recyclization of 3,4‐diaryl‐5‐(ethoxycarbonyl)isoxazoline N‐oxides 9 unexpectedly yielded 5‐hydroxy‐1,2‐oxazin‐6‐ones 17.
3,4-二芳基异恶唑-5-羧酰胺6,热休克蛋白抑制剂的结构类似物,是由中间3,4-二芳基-5-酰胺基异恶唑啉N-氧化物的简单可伸缩的重排作用得到5。与此相反,3,4-二芳基-5-(乙氧基羰基)异恶唑啉N-氧化物的碱催化的再成环9意外得到5-羟基-1,2-恶嗪-6-酮17。