128
ORGANIC SYNTHESIS—1995
I.E.3-23 Sano, T. et al., CPB, 42, 1373; Haga, N. et al., BCJ, 67, 728.
MeO.
MeO
C0 2 Et
hv
Et0 2 C
O DME,0°C, ih
+
MeO
OTMS
MeO
C0 2 Et
™
S 0
Etofc °
11%
e.e. = 99%
I.E.3-24 Ciufolini, M.A. et al., JACS, 116, 1272.
+
hv
R
50-90%
(0.26-9:1)
ORGANIC SYNTHESIS—1995
I.E.3-23 Sano, T. et al., CPB, 42, 1373; Haga, N. et al., BCJ, 67, 728.
MeO.
MeO
C0 2 Et
hv
Et0 2 C
O DME,0°C, ih
+
MeO
OTMS
MeO
C0 2 Et
™
S 0
Etofc °
11%
e.e. = 99%
I.E.3-24 Ciufolini, M.A. et al., JACS, 116, 1272.
+
hv
R
50-90%
(0.26-9:1)