Rhodium- and Non-Metal-Catalyzed Approaches for the Conversion of Isoxazol-5-ones to 2,3-Dihydro-6<i>H</i>-1,3-oxazin-6-ones
作者:Igor D. Jurberg、Huw M. L. Davies
DOI:10.1021/acs.orglett.7b02436
日期:2017.10.6
dirhodium-catalyzed reaction of aryl diazoacetates, leading to rhodium carbene intermediates that undergo insertion into the N–O bond of isoxazol-5-ones. The second approach involves conversion of the aryldiazoacetates to the corresponding tosylates, followed by reaction with the isoxazol-5-one in a metal-free one-pot procedure. These studies illustrate an alternative method to achieve a carbene-like transformation
开发了两种方法将异恶唑-5-酮转化为2,3-二氢-6 H -1,3-恶嗪-6-酮。第一个涉及芳基重氮乙酸酯的铑催化反应,导致铑卡宾中间体插入异恶唑-5-酮的N–O键中。第二种方法涉及将芳基重氮乙酸酯转化为相应的甲苯磺酸酯,然后在无金属的一锅法中与异恶唑-5-酮反应。这些研究说明了无需金属催化剂即可实现卡宾样转化的另一种方法。