作者:Luping Liu、Markus Leutzsch、Yiying Zheng、M. Wasim Alachraf、Walter Thiel、Benjamin List
DOI:10.1021/jacs.5b09484
日期:2015.10.21
A highlyenantioselective Brønsted acid catalyzed intramolecular carbonyl-enereaction of olefinic aldehydes has been developed. Using a confined imidodiphosphate catalyst, the reaction delivers diverse trans-3,4-disubstituted carbo- and heterocyclic five-membered rings in high yields and with good to excellent diastereo- and enantioselectivities. ESI-MS, NMR, and DFT mechanistic studies reveal that