114
ORGANIC SYNTHESIS—1995
I.E.1-38 Corey, E.J. et al., JACS, 116, 3611; Hawkins, J.M. et al.,
JACS, 116, 1657.
TIPSO
TIPSO
CHO
CH 2 C1 2 , -78°C
83%
e.e. = 97%
I.E. 1-39 Maroral, J.A. et al., CJC, 72, 308.
Hexafluoro-2-propanol as a solvent for DielsAlder reactions in which Lewis acid sensitive
reagents are used. High yields with good regioand endo/exo selectivities under mild conditions.
I.E.1-40 Kobayashi, S. et al., TL, 35, 6325.
NR,
M(OTf) 3
NR 3
M= Yb, Sc
Chiral Diels-Alder catalysts
ORGANIC SYNTHESIS—1995
I.E.1-38 Corey, E.J. et al., JACS, 116, 3611; Hawkins, J.M. et al.,
JACS, 116, 1657.
TIPSO
TIPSO
CHO
CH 2 C1 2 , -78°C
83%
e.e. = 97%
I.E. 1-39 Maroral, J.A. et al., CJC, 72, 308.
Hexafluoro-2-propanol as a solvent for DielsAlder reactions in which Lewis acid sensitive
reagents are used. High yields with good regioand endo/exo selectivities under mild conditions.
I.E.1-40 Kobayashi, S. et al., TL, 35, 6325.
NR,
M(OTf) 3
NR 3
M= Yb, Sc
Chiral Diels-Alder catalysts