Synthesis of (4-Trifluoromethyl)isoxazoles through a Tandem Trifluoromethyloximation/Cyclization/Elimination Reaction of α,β-Unsaturated Carbonyls
作者:Paramita Pattanayak、Tanmay Chatterjee
DOI:10.1021/acs.joc.2c03053
日期:——
pharmaceutically potential heteroaromatics, i.e., 4-(trifluoromethyl)isoxazoles including a trifluoromethyl analogue of an anticancer agent. The transformation requires only a couple of commercially available and cheap reagents i.e., CF3SO2Na as the trifluoromethyl source, and tBuONO as an oxidant as well as a source of N and O. Notably, 5-alkenyl-4-(trifluoromethyl)isoxazoles were further synthetically diversified
我们公开了一种无金属、级联区域和立体选择性三氟甲基肟化、环化和消除策略,使用现成的 α,β-不饱和羰基化合物来获得各种具有药学潜力的杂芳烃,即 4-(三氟甲基) 异恶唑,包括三氟甲基抗癌剂的类似物。该转化仅需要几种市售的廉价试剂,即 CF 3 SO 2 Na 作为三氟甲基源,以及tBuONO 作为氧化剂以及 N 和 O 的来源。值得注意的是,5-alkenyl-4-(trifluoromethyl)isoxazoles 进一步合成多样化为一类新的双杂芳基,即 5-(3-pyrrolyl)-4-(三氟甲基)异恶唑。机理研究揭示了反应的激进途径。