264
ORGANIC SYNTHESIS—1995
IV.G-9 Beaudegnies, R. and Ghosez, L., TA, 5, 557; Gilchrist, T.L. et al.,
T, 50, 13709; Menendez, J.C. et al., T, 50, 10047; Tapia, R. et al., H, 38,
1797; Balsamini, C. et al., T, 50, 12375.
X = NMe,
►
^ N v
R 2 „
,NPh,o r > - P
:
*■ J
Λ1 OR 3
51-81%, de 73->98%
IV.G-10 Barco, A. et al., T, 50, 2583.
CO r (L)-menthyl
^-C0 2 -(L)-menthyl
OAc
f
0 2 N^ ^
"(T^OMe k, x
1
EtOH,K 2 C0 3 ,25°
*~ ^ n
5 1 %
IV.G-11 Koyama, J. et al., H, 38, 1595; see also: Sanchez, A. et al., T,
50, 10345.
I=CH-R
o
Me
M e ^ N
32-78%
ORGANIC SYNTHESIS—1995
IV.G-9 Beaudegnies, R. and Ghosez, L., TA, 5, 557; Gilchrist, T.L. et al.,
T, 50, 13709; Menendez, J.C. et al., T, 50, 10047; Tapia, R. et al., H, 38,
1797; Balsamini, C. et al., T, 50, 12375.
X = NMe,
►
^ N v
R 2 „
,NPh,o r > - P
:
*■ J
Λ1 OR 3
51-81%, de 73->98%
IV.G-10 Barco, A. et al., T, 50, 2583.
CO r (L)-menthyl
^-C0 2 -(L)-menthyl
OAc
f
0 2 N^ ^
"(T^OMe k, x
1
EtOH,K 2 C0 3 ,25°
*~ ^ n
5 1 %
IV.G-11 Koyama, J. et al., H, 38, 1595; see also: Sanchez, A. et al., T,
50, 10345.
I=CH-R
o
Me
M e ^ N
32-78%