Chemistry Reference
In-Depth Information
Table 9.1 Continued )
catalyst (0.25 mol%): Rh(acac)(CO) 2 /ligand* (ratio 1:2)
H 2 , CO, toluene
CHO
*
+
+
*
CHO
O
O
O
O
31
32
33
34
(undesired)
(undesired)
R 2
R 1
O
O
O
Entry
Ligand
Yield 32 + 33 (%)
Yield 34 (%)
Ratio 32 : 33
ee (%)
=
O
R 2
R 1
D- allo
Me
O
P
O
O
14b
O
12
92
8
98 : 2
47 (R)
R 1
=
R 2
=
t Bu
O
O
O
O
P
Me
Me
O
L- talo
O
P
Me
O
O
15b
O
13
75
15
96 : 4
27 (R)
R 1
=
R 2
=
t Bu
O
O
O
O
Me
P
O
Me
D- gluco
TBDPSO
O
O
O
P
37b
P
O
O
O
14
92
8
97 : 3
61 (S)
O
R 1
R 2
=
=
t Bu
O
O
Me
Me
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