Oxy-Allyl Cation Catalysis: An Enantioselective Electrophilic Activation Mode
作者:Chun Liu、E. Zachary Oblak、Mark N. Vander Wal、Andrew K. Dilger、Danielle K. Almstead、David W. C. MacMillan
DOI:10.1021/jacs.5b13041
日期:2016.2.24
enantioselective conversion of racemic α-tosyloxy ketones to optically enriched α-indolic carbonyls has been accomplished using a new amino alcohol catalyst in the presence of electron-rich indole nucleophiles. Kineticstudies reveal that the rate-determining step in this S(N)1 pathway is the catalyst-mediated α-tosyloxy ketone deprotonation step to form an enantiodiscriminant oxy-allyl cation prior to