Copper-Catalyzed [2 + 3] Cyclization of α-Hydroxyl Ketones and Arylacetonitriles: Access to Multisubstituted Butenolides and Oxazoles
作者:Chaorong Qi、Youbin Peng、Lu Wang、Yanwei Ren、Huanfeng Jiang
DOI:10.1021/acs.joc.8b01822
日期:2018.10.5
A copper-catalyzed [2 + 3] formal cyclization reaction between α-hydroxyl ketones and arylacetonitriles has been developed. The reaction outcome was ultimately dependent on the structure of the α-hydroxy ketones employed. Tertiary α-hydroxy ketones gave 3,4,5,5-tetrasubstituted butenolides as the sole products, while secondary α-hydroxy ketones furnished 2,4,5-trisubstituted oxazoles selectively. This
已经开发出铜催化的[2 + 3]形式的α-羟基酮与芳基乙腈之间的环化反应。反应结果最终取决于所用α-羟基酮的结构。叔α-羟基酮为唯一产物,提供3,4,5,5-四取代的丁烯内酯,而仲α-羟基酮则选择性地提供了2,4,5-三取代的恶唑。该方法具有许多优点,例如使用容易获得的底物,广泛的底物范围,良好的功能耐受性和较温和的反应条件。