54
ORGANIC SYNTHESIS—1995
I.A.7.b.l-6 Barluenga, J. et al., AG(E), 33, 1392.
XX
(CO)sCr
R©
.XX.
R
1
(CO) 5 Cr^ ^
R
89-95% de
I.A.7.b.l-7 Pelter, A., Ward, R.S. and Storer, N.P., T, 50, 10829.
OMen
OTJ TBS
l)-4)
A r
1 ^ ^ C N
O
OMen
H(
V Λ
A!·
2
O
80%
Q1)LDA 2) t T \
3)Ar^CHO 4) TBAF
Ö
I.A.7.b.l-8 Hagiwara, H. et al., JCS(Pl), 2417; see also: Klimko, P.G.
and Singleton, D.A., 5, 979; see also: Padwa, A. et al., JOC, 59, 3256.
TBS
Me
TBSO
C0 2 Me
OMe
D-2)
78%
1) LDA, THF, HMPA 2) NaOMe
various other double Michael additions reported
ORGANIC SYNTHESIS—1995
I.A.7.b.l-6 Barluenga, J. et al., AG(E), 33, 1392.
XX
(CO)sCr
R©
.XX.
R
1
(CO) 5 Cr^ ^
R
89-95% de
I.A.7.b.l-7 Pelter, A., Ward, R.S. and Storer, N.P., T, 50, 10829.
OMen
OTJ TBS
l)-4)
A r
1 ^ ^ C N
O
OMen
H(
V Λ
A!·
2
O
80%
Q1)LDA 2) t T \
3)Ar^CHO 4) TBAF
Ö
I.A.7.b.l-8 Hagiwara, H. et al., JCS(Pl), 2417; see also: Klimko, P.G.
and Singleton, D.A., 5, 979; see also: Padwa, A. et al., JOC, 59, 3256.
TBS
Me
TBSO
C0 2 Me
OMe
D-2)
78%
1) LDA, THF, HMPA 2) NaOMe
various other double Michael additions reported