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。
Rhodium(II)-Catalyzed Stereoselective Synthesis of Allylsilanes
作者:David M. Guptill、Carolyn M. Cohen、Huw M. L. Davies
DOI:10.1021/ol4028978
日期:2013.12.20
The rhodium-catalyzed decomposition of 2-(triisopropylsilyl)ethyl aryl- and vinyldiazoacetates results in the stereoselectiveformation of Z-allylsilanes. The transformation is considered to proceed by silyl-directed intramolecular C–H functionalization to form a β-lactone intermediate followed by a silyl-activated extrusion of carbon dioxide.