112
ORGANIC SYNTHESIS—1995
I.E.1-32 Carreno, M.C., Ruano, J.L.G. et al., JOC, 59, 3421;
Carretero, J.C., Ruano, J.L.G. et al., TL, 35, 9461, 9759; Gosselin, P.,
Maignan, C. et al., TA, 5, 781.
4-MeC 6 H 4 \ ^
0
ο
4 - M e C 6 H 4 ^ * °
SnCl 4 , CH 2 C1 2
NMe
»■
NMe
65-84%
I.E.1-33 Sammakia, T. and Berliner, M.A., JOC, 59, 6890; Cativiela, C.
et al., TA, 5, 157.
TiCI 4
Ti(Q'Pr) 4
CH 2 C1 2 M e ^ ^O
Me -78°C, 0.5h
Me
Me
d.e. = 7.5:1
I.E.1-34 Shirahama, H. et al., SL, 801; Chen, Z. and Ortuno, R.M., TA,
5, 371.
BnO
Me0 2 C
OTMS
BnO
Me0 2 C z
2
H
OTMS
83%