Enantioselective Organocatalytic Three-Component Vinylogous Michael/Aldol Tandem Reaction among 3-Alkylidene oxindoles, Methyleneindolinones, and Aldehydes
作者:Jing-Xiang Xu、Yi-Syun Jiang、Chih-Hao Chen、Nadaraj Sathishkumar、Kai-Ti Chu、Ming-Hsi Chiang、Hsin-Tsung Chen、Jeng-Liang Han
DOI:10.1021/acs.joc.1c02180
日期:2022.1.7
We reported a one-pot enantioselective three-component vinylogous Michael/aldol tandem reaction of prochiral 3-alkylidene oxindoles with methyleneindolinones and aldehydes using bifunctional organocatalysts. A variety of enantioenriched 3,3-disubstituted oxindoles 3 and spirolactones 4 were generated in moderate yields (up to 78%) with high stereoselectivities (up to >20:1 dr, >99% ee). Intriguingly
我们报道了使用双功能有机催化剂的前手性 3-亚烷基羟吲哚与亚甲基吲哚啉酮和醛的一锅对映选择性三组分乙烯基 Michael/aldol 串联反应。多种对映体富集的 3,3-二取代羟吲哚3和螺内酯4以中等收率(高达 78%)和高立体选择性(高达 >20:1 dr,>99% ee)生成。有趣的是,我们观察到与多聚甲醛的羟醛反应生成带有羟甲基的3,3-二取代羟吲哚3 ,而与脂肪醛的反应生成螺内酯4。