132
ORGANIC SYNTHESIS—1995
I.F.1-8 Natsume, M. et al., CPB, 42, 1393.
PivO
NTs
PivO
BF 3 'Et 2 0
NTs
66%
I.F.1-9 Kawada, A., Mitamura, S. and Kobayashi, S., SL, 545.
Ac 2 0, Sc(OTf) 3
MeO
O MeN0 2 , 50°C, 4h
*► MeO
89%
Ac
I.F.1-10 Sartori, G. et al., TL, 35, 2393.
Me
/
= \
AIC1 3
M e — ^ ff~~
0 H +MeN0 2
-+Me
Me—L y ~
0 H
NOH
70%
I.F.1-11 Jefford, C.W. et al., TL, 35, 6271.
O
N
1. BBr 3
OCOCH 2 OAc
2. AcCI, base
ex
N
COCH 2 OAc
OAc
R
R
65-70%
ORGANIC SYNTHESIS—1995
I.F.1-8 Natsume, M. et al., CPB, 42, 1393.
PivO
NTs
PivO
BF 3 'Et 2 0
NTs
66%
I.F.1-9 Kawada, A., Mitamura, S. and Kobayashi, S., SL, 545.
Ac 2 0, Sc(OTf) 3
MeO
O MeN0 2 , 50°C, 4h
*► MeO
89%
Ac
I.F.1-10 Sartori, G. et al., TL, 35, 2393.
Me
/
= \
AIC1 3
M e — ^ ff~~
0 H +MeN0 2
-+Me
Me—L y ~
0 H
NOH
70%
I.F.1-11 Jefford, C.W. et al., TL, 35, 6271.
O
N
1. BBr 3
OCOCH 2 OAc
2. AcCI, base
ex
N
COCH 2 OAc
OAc
R
R
65-70%