An I2-promoted formal [3+2] cycloaddition for access to oxazoles has been demonstrated. This is the first example of a Lewis acid-promoted formal [3+2] cycloaddition of isocyanides with methyl ketones involves...
Development of a Continuous Flow Photoisomerization Reaction Converting Isoxazoles into Diverse Oxazole Products
作者:Cormac Bracken、Marcus Baumann
DOI:10.1021/acs.joc.9b03399
日期:2020.2.21
A continuous flow process is presented, which directly converts isoxazoles into their oxazole counterparts via a photochemical transposition reaction. This results in the first reported exploitation of this transformation to establish its scope and synthetic utility. A series of various di- and trisubstituted oxazole products bearing different appendages including different heterocyclic moieties were
Silver‐Induced [3+2] Cycloaddition of Isocyanides with Acyl Chlorides: Regioselective Synthesis of 2,5‐Disubstituted Oxazoles
作者:Jian‐Quan Liu、Xuanyu Shen、Andrey Shatskiy、Enlong Zhou、Markus D. Kärkäs、Xiang‐Shan Wang
DOI:10.1002/cctc.201900965
日期:2019.9.5
A silver‐induced cycloaddition of isocyanides with acyl chlorides has been developed. This transition metal‐catalyzed strategy provides an effective and scalable approach for the formation of 2,5‐disubstituted oxazoles in good to high yields. The employed silver‐based MOF catalyst can be efficiently recycled without compromising the yield.