Platinum-catalyzed cyclizations viacarbene intermediates: syntheses of complementary positional isomers of isoxazoles
作者:Paul A. Allegretti、Eric M. Ferreira
DOI:10.1039/c2sc21671j
日期:——
A novel synthesis of regioisomeric isoxazoles is described. Using catalytic platinum, both propargylic N-hydroxycarbamates and N-alkoxycarbonyl amino ethers can be cyclized to form differentially substituted isoxazoles. Reaction conditions are developed that address specific aspects of the catalytic manifold. A unique mechanism involving a Pt-carbene intermediate is proposed, and deuterium labeling
描述了区域异构异恶唑的新颖合成。使用催化铂,炔丙基N-羟基氨基甲酸酯和N-烷氧基羰基氨基醚都可以被环化以形成差异取代的异恶唑。已经开发出解决催化歧管特定方面的反应条件。提出了涉及Pt-卡宾中间体的独特机理,氘标记研究证实了这一假说。抗鼻病毒类似物的合成突显了这种对异恶唑的区域互补方法,说明了该科学与药物化学的相关性。