Chemistry Reference
In-Depth Information
S
S
S
Li
S
S
Br
S
5
η
5
η
(OC)
3
Cr
(OC)
3
Cr
(OC)
3
Cr
10.187
10.188
10.192
CO insertion
I
2
H
+
S
S
S
S
S
S
5
η
10.189
(OC)
3
Cr
(OC)
3
Cr
H
10.190
10.193
O
reductive
elimination
reductive
elimination
S
S
O
S
S
10.191
10.194
Scheme 10.50
i
-Pr
i
-Pr
OMe
OMe
O
H
N
N
1. MeI, CO
2. NaOEt, MeI
H
Li
OE
t
OEt
OEt
Me
(OC)
3
Cr
(OC)
3
Cr
O
1
1
1
1
10.195
OPMB
H
OPMB
H
1. H
3
O
+
2. NaBH
4
, CeCl
3
3. PMBI, NaH
NMe
2
MeO
OMe
NMe
2
O
Me
OH
Me
10.198
10.199
OPMB
H
OAc
H
1. DDQ
2. DIBAL
3. AcOH
4. Ac
2
O, py
1. I
2
, KI, NaHCO
3
2.
n
-Bu
3
SnH
3. LDA, PhSeCl; H
2
O
2
O
O
O
Me
H
Me
1
2
0
1
.
Scheme 10.51
