Chemistry Reference
In-Depth Information
OAc
O
PMBO
BnO
OAc
N
3
O
O
OA c
PMBO
BnO
OAc
O
N
3
O
PMB
BnO
O
MeO
2
C
OAc
O
CCl
3
OBn
N
3
O
OA c
TMSOTf
CH
2
Cl
2
61%
7
O
OBn
OAc
MeO
2
C
OAc
NH
O
OAc
O
BnO
O
HO
BnO
MeO
2
C
OBn
N
3
O
N
3
O
OA c
OAc
6
OAc
9
OAc
O
O
MeO
2
C
MeO
2
C
OBn
OBn
8
Scheme 2
MeO
2
C
NH
Ph
O
O
OMe
O
O
LevO
PivO
O
HO
O
+
n
O
O
CCl
3
PivO
NPhth
11
10
TMSOTf
CH
2
Cl
2
Ph
O
MeO
2
C
O
OMe
O
O
O
O
O
Le vO
PivO
O
n
NPhth
12
PivO
Scheme 3
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