332
ORGANIC SYNTHESIS—1995
VLA.1-3 Sanders, W.J. and Kiessling, L.L., TL, 35, 7335; Nishizawa, M.
et al., CPB, 42, 2400; Susaki, H., CPB, 42, 1917; see also: Schmid, W. et
al., T, 50, 10407.
R-OH, Ph-Me, 3 À MS
Yb(OTf) 3 or Ηο(ΟΤθ'
O |
Δ
s^
o
o
RO
OR'
OH
71-92 %
VI.A.1-4 Hashimoto, H. et al., T, 50, 12143.
O
χ
/ C H 2 - 0 - S i M e 3
M e ^ N : 0 2 E t ,
^- CH-O—SiMe 3
TMSOTf
/ C H 2 - O y
M e
VI.A.1-5 Pedersen, E.B. et al., JMC, 37, 73.
C0 2 Et
21-65 %
R '
r O A c
R - ^ v
S>
AcO-^Λ-^Ο
OAcl
H
Y
NaH, MeCN
OAc 72-95 %
ORGANIC SYNTHESIS—1995
VLA.1-3 Sanders, W.J. and Kiessling, L.L., TL, 35, 7335; Nishizawa, M.
et al., CPB, 42, 2400; Susaki, H., CPB, 42, 1917; see also: Schmid, W. et
al., T, 50, 10407.
R-OH, Ph-Me, 3 À MS
Yb(OTf) 3 or Ηο(ΟΤθ'
O |
Δ
s^
o
o
RO
OR'
OH
71-92 %
VI.A.1-4 Hashimoto, H. et al., T, 50, 12143.
O
χ
/ C H 2 - 0 - S i M e 3
M e ^ N : 0 2 E t ,
^- CH-O—SiMe 3
TMSOTf
/ C H 2 - O y
M e
VI.A.1-5 Pedersen, E.B. et al., JMC, 37, 73.
C0 2 Et
21-65 %
R '
r O A c
R - ^ v
S>
AcO-^Λ-^Ο
OAcl
H
Y
NaH, MeCN
OAc 72-95 %