Catalytic Asymmetric [3 + 2] Cycloaddition Reaction between Aurones and Isocyanoacetates: Access to Spiropyrrolines via Silver Catalysis
作者:Zhi-Peng Wang、Sichuan Xiang、Pan-Lin Shao、Yun He
DOI:10.1021/acs.joc.8b01622
日期:2018.9.21
The first enantioselective formal [3 + 2] cycloaddition of aurone analogues with isocyanoacetates was developed via chiral Ag-complex catalysis. A variety of optically enriched spiro-1-pyrrolines were obtained in excellent yields, diastero- and enantioselectivities (up to 99% yield, >20:1 dr, >99% ee). This synthetic approach represents an extremely simple, efficient, and atom-economical method for
通过手性Ag络合物催化,开发了具有异氰基乙酸酯的金酮类似物的第一个对映选择性的正式[3 + 2]环加成反应。以优异的收率,非对映选择性和对映选择性(高达99%的收率,> 20:1 dr,> 99%ee的收率)获得了各种光学富集的螺-1-吡咯啉。这种合成方法代表了螺-1-吡咯啉合成的一种极其简单,有效且经济的方法。