作者:Jia, Li、Wang, Ting、Chen, Jingchao、Zhao, Hongyan、Yao, Pengjie、Fan, Baomin
DOI:10.1021/acs.orglett.4c01958
日期:——
The asymmetric Mannich-type reaction of quinoxalin-2-ones with difluoroenoxysilanes has been developed for the synthesis of chiral gem-difluoroalkylated quinoxalin-2-ones. The reaction worked in the presence of chiral phosphoric acid CPA 1 and B(C6F5)3 in THF at room temperature. The reaction exhibited a good substrate scope furnishing the products in good yields (up to 97%) with up to 96% ee.
喹喔啉-2-酮与二氟烯氧基硅烷的不对称曼尼希型反应已被开发用于合成手性宝石-二氟烷基化喹喔啉-2-酮。该反应在手性磷酸CPA 1和B(C 6 F 5 ) 3的存在下在THF中在室温下进行。该反应表现出良好的底物范围,使产物具有良好的收率(高达 97%)和高达 96% ee 。