138
ORGANIC SYNTHESIS—1995
I.F.3-3 Kimura, Y. et al., SL, 61; Queguiner, G. et al., JOC, 59, 6173;
Snieckus, V.A. et al., TL, 35, 7537; Mortier, J., Bennetau, B. et al., JOC,
59, 4042.
OBn
1. BuLi, Ph-Me, rt, 3h
2. ClC0 2 Me, rt, 2h
C0 2 Me
87% (gc)
I.F.3-4 Meyers, A.I. and Shimano, M., JACS, 116, 10815.
Li
^ T N ' P r ,
\ . ^ OR
2. Mel
MeO'
MeO
N'Pr,
I.F.3-5 Suzuki, K. et al., JACS, 116, 1004 and PAC, 66, 2175; see
also: Stamos, I.K. et al., SC, 24, 1129.
OBn
OBn
Λ ΟΒη
Y'
AC(
L°NTMe Cp 2 HfCl 2
Il
+ ΒηθΤ
7
Λ ^ Ι Λ — ί ϊ ^
AgCIO 4 ,-20°C
OBn
BnO
OBn
86%
α:β = 8.2:1
ORGANIC SYNTHESIS—1995
I.F.3-3 Kimura, Y. et al., SL, 61; Queguiner, G. et al., JOC, 59, 6173;
Snieckus, V.A. et al., TL, 35, 7537; Mortier, J., Bennetau, B. et al., JOC,
59, 4042.
OBn
1. BuLi, Ph-Me, rt, 3h
2. ClC0 2 Me, rt, 2h
C0 2 Me
87% (gc)
I.F.3-4 Meyers, A.I. and Shimano, M., JACS, 116, 10815.
Li
^ T N ' P r ,
\ . ^ OR
2. Mel
MeO'
MeO
N'Pr,
I.F.3-5 Suzuki, K. et al., JACS, 116, 1004 and PAC, 66, 2175; see
also: Stamos, I.K. et al., SC, 24, 1129.
OBn
OBn
Λ ΟΒη
Y'
AC(
L°NTMe Cp 2 HfCl 2
Il
+ ΒηθΤ
7
Λ ^ Ι Λ — ί ϊ ^
AgCIO 4 ,-20°C
OBn
BnO
OBn
86%
α:β = 8.2:1