作者:Minghui Jiang、Lifei Feng、Juanjuan Feng、Peng Jiao
DOI:10.1021/acs.orglett.7b00558
日期:2017.5.5
1,3-Dipolar cycloadditions of 2-alkylacroleins or atropaldehyde with triisopropylsilyl nitronates bearing an alpha-ary] group produced 3-aryl-2-isoxazolines having a chiral quaternary center in up to 94% ee and up to 88% yield with the aid of Corey's oxazaborolidine catalyst. Specifically, the TIPS nitronate with an alpha-(p-methoxyphenyl) group gave mainly the 2-isoxazolines having an all-carbon quaternary center.