92
ORGANIC SYNTHESIS—1995
I.B.5-9 Jones, G.S. et al., TL, 35, 9685; Johnson, W.S. et al., JOC,
59, 6150.
SnCl,
O
O
TMS
CH 2 C1 2
-40°C
LB.5-10 Kita, Y. et al., CPB, 42, 233.
RMe 2 Si
W
+ Ph.CHR
1 !*
2
O
84%
RMe 2 Si
k c Y
R l
R
2
47-98%
Ι.Γ. Carhon-Carhon Triple Bonds
I.C-1 Cabezas, J.A. and Oehlschlager, A.C., JOC, 59, 7523.
RO
Me
1. LDA, THF
\
2. (EtO) 2 POCl, HMPA, -78°C
/
3. 'BuLi, ■100^ -30°C
RO
55-68%
I.C-2 Miwa, K., Aoyama, T., and Shioiri, T., SL, 107.
Ar
\ = 0
+TMSCHN 2
R
LDA, THF
.
A r — ^ = — R
29-84%
ORGANIC SYNTHESIS—1995
I.B.5-9 Jones, G.S. et al., TL, 35, 9685; Johnson, W.S. et al., JOC,
59, 6150.
SnCl,
O
O
TMS
CH 2 C1 2
-40°C
LB.5-10 Kita, Y. et al., CPB, 42, 233.
RMe 2 Si
W
+ Ph.CHR
1 !*
2
O
84%
RMe 2 Si
k c Y
R l
R
2
47-98%
Ι.Γ. Carhon-Carhon Triple Bonds
I.C-1 Cabezas, J.A. and Oehlschlager, A.C., JOC, 59, 7523.
RO
Me
1. LDA, THF
\
2. (EtO) 2 POCl, HMPA, -78°C
/
3. 'BuLi, ■100^ -30°C
RO
55-68%
I.C-2 Miwa, K., Aoyama, T., and Shioiri, T., SL, 107.
Ar
\ = 0
+TMSCHN 2
R
LDA, THF
.
A r — ^ = — R
29-84%