56
ORGANIC SYNTHESIS—1995
I.A.7.b.l-12 Ranu, B.C. et al., JCS(Pl), 2197; Kobayashi, S. et al., CL,
97.
ΟΤλ
s, + ^ I - ^
^ ^
R
ZnCl 2 , rt
51-86%
a chiral binaphthol Ti=0 species used similarly
I.A.7.b.l-13 Grieco, P.A. et al., JOC, 59, 6898; Helmchen, G. et al.,
TL, 35, 233.
* ..A
LiCo(B 9 C 2 H n ) 2
Me(r -OTBS !, 2 .DCE, 9 min
97%
C0 2 Me
P4O10 used similarly
I.A.7.b.2. Organometallic and Related Reagents
I.A.7.b.2-l Cooke, M.P., Jr. and Gopal, D., TL, 35, 2837 & JOC, 59,
260.
C0 2
4 Bu
C0 2 'Bu
1) BuLi
2)H
+
X 0 2
l B u
97%
ORGANIC SYNTHESIS—1995
I.A.7.b.l-12 Ranu, B.C. et al., JCS(Pl), 2197; Kobayashi, S. et al., CL,
97.
ΟΤλ
s, + ^ I - ^
^ ^
R
ZnCl 2 , rt
51-86%
a chiral binaphthol Ti=0 species used similarly
I.A.7.b.l-13 Grieco, P.A. et al., JOC, 59, 6898; Helmchen, G. et al.,
TL, 35, 233.
* ..A
LiCo(B 9 C 2 H n ) 2
Me(r -OTBS !, 2 .DCE, 9 min
97%
C0 2 Me
P4O10 used similarly
I.A.7.b.2. Organometallic and Related Reagents
I.A.7.b.2-l Cooke, M.P., Jr. and Gopal, D., TL, 35, 2837 & JOC, 59,
260.
C0 2
4 Bu
C0 2 'Bu
1) BuLi
2)H
+
X 0 2
l B u
97%