Total syntheses of (−)-lycorine and (−)-2-epi-lycorine were accomplished using chiral ligand-controlled asymmetric cascade conjugate addition methodology, which enables the formation of two C−C bonds and three stereogenic centers in one pot to give synthetically useful chiral cyclohexane derivatives.
Dickens; Kon; Thorpe, Journal of the Chemical Society, 1922, vol. 121, p. 1502
作者:Dickens、Kon、Thorpe
DOI:——
日期:——
FOOS J.; STEEL F.; RIZVI S. Q. A.; FRAENKEL G., J.ORG. CHEM., 1979, 44, NO 14, 2522-2529
作者:FOOS J.、 STEEL F.、 RIZVI S. Q. A.、 FRAENKEL G.
DOI:——
日期:——
Synthesis and nuclear magnetic resonance spectra of N-carboethoxy-4-spiro-1,4-dihydropyridines
作者:Joseph Foos、Frank Steel、S. Q. A. Rizvi、Gideon Fraenkel
DOI:10.1021/jo01328a042
日期:1979.7
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