SYNTHESIS OF HETEROCYCLES
277
IVJ-2 Albertini, E. et al., 7X, 35, 9297; Guanti, G. et al., ΓΛ, 5, 537.
Ms(X ^ ν .
XX
Ar'
ΝΗ,
Ar
~JL*fi
Similar route to a quinuclidine
IV.J-3 Davies, H.M.L., Childers, S.R. et al., JMC, 37, 1262
Boc
—Boc +
Rh 2 L 4
hexane
reflux
IV.J-4 Ziegler, C.B., Jr. et al, T, 50, 12085; see also: Horikawa, H. et
al, TL, 35, 6317; Padova, A. et al., CC, 441.
S0 2 Ar
OTBS
X W 3. 1 5eq
LiN(TMS) 2
-78 °C, THF
OTBS
C0 2 PNB
'per
58%
S0 2 Ar
H ' ^C0 2 PNB
IV.J-5 Keusenkothen, P.F. and Smith, M.B., JCS(Pl), 2485
Bu 3 SnH
.OJ:
(Bu 3 Sn) 2
hv
O EtI
81%
0
AIBN
1
Ph-H
Ό
87%