72
ORGANIC SYNTHESIS—1995
I.B.1-8 Hodgson, D.M. and Comina, P.J., TL, 35, 9469.
CrCI 2
^ ^ ^TMS
RCHO + (TMS) 2 CBr 2 DMF, 25°C
R
TMS
58-84%
I.B.1-9 Lawrence, N.J. and Muhammad, F., CC, 1187.
PPh,
M
OH
PC1 3 , TEA
R
R *
* p h
CH 2 C1 2 , rt, 2h
Ph
32-99%
E:Z = >19:1
I.B.1-10 Tokoroyam, T. et al., SL, 725; Jousseaume, B. et al., JOC, 59,
1925.
PhSO,
Y
+
I
BuLi
R
s^
THF
SiPh 3 Me
.78°C^rt
,
OSiPh 2 Me
R
F
71-89%
I.B.1-11 Hatanaka, M. et al., JOC, 59, 111.
PPh
R. ^O
NaHC0 3
2
CH 2 CI 2 /H 2 0
R 2
^
. R
^
Et0 2 C
R
1
C0 2 Et
<90%
ORGANIC SYNTHESIS—1995
I.B.1-8 Hodgson, D.M. and Comina, P.J., TL, 35, 9469.
CrCI 2
^ ^ ^TMS
RCHO + (TMS) 2 CBr 2 DMF, 25°C
R
TMS
58-84%
I.B.1-9 Lawrence, N.J. and Muhammad, F., CC, 1187.
PPh,
M
OH
PC1 3 , TEA
R
R *
* p h
CH 2 C1 2 , rt, 2h
Ph
32-99%
E:Z = >19:1
I.B.1-10 Tokoroyam, T. et al., SL, 725; Jousseaume, B. et al., JOC, 59,
1925.
PhSO,
Y
+
I
BuLi
R
s^
THF
SiPh 3 Me
.78°C^rt
,
OSiPh 2 Me
R
F
71-89%
I.B.1-11 Hatanaka, M. et al., JOC, 59, 111.
PPh
R. ^O
NaHC0 3
2
CH 2 CI 2 /H 2 0
R 2
^
. R
^
Et0 2 C
R
1
C0 2 Et
<90%