USEFUL SYNTHETIC PREPARATIONS
349
VI.A.6-7 Fioravanti, S., Pellacani, L. et al., T, 50, 3829; Gmeiner, P. and
Bollinger, B., T, 50, 10909; Cativiela, C. et al., TA, 5, 1465.
OTMS
H
I
NsO
CQ 2 Et
CaO, CH 2 CI 2
O
NHC0 2 Et
67%
VI.A.6-8 Katritzky, A.R. et al., JOC, 59, 7947; Matsumura, Y. et al., TL,
35, 3737; Takai, K. et al., TL, 35, 1893.
^ ν ^ \ ^
Ph-Me, Δ
H
I
R 2
60-93 %
VI.A.6-9 Hoffman, R.V. et al., TL, 35, 3231; Eisch, J.J. et al., JOC, 59, 7.
R
O
JK ^OTf
N
1 ; Φ Γ Ο Η , Δ
^ ^ T M S
R
O
A.
Me
I
H 60-80 %
VI.A.6-10 Krawczyk, H., SC, 24, 2263; Johnnsen, M. and Jorgensen, K.A.,
JOC, 59, 214.
O
o
EtO^p
C 0 2 H
(CH 7 Q) n ,R 7 NH,A
EtO
EtO
29-92 %
N R 2