et. al. J. Am. Chem. Soc.
et. al. J. Am. Chem. Soc.
et. al. J. Am. Chem. Soc.
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O<br />
O<br />
Li<br />
t-BuLi<br />
95 %<br />
Cuprate<br />
O<br />
Bu 2Cu(CN)Li 2<br />
Li<br />
Preparation of Bromide<br />
(Bu 3Sn)(Bu)Cu(CN)Li 2<br />
O<br />
MeI, 75 %<br />
Cu CN<br />
R<br />
+<br />
2-<br />
Bu 3SnH<br />
O Cu R<br />
CN<br />
HO<br />
LiO<br />
Me<br />
SnBu 3<br />
Cu(CN)Li<br />
R<br />
1. MsCl, Et 3N<br />
2. LiBr, ac<strong>et</strong>one<br />
E +<br />
Br<br />
HO<br />
Me<br />
SnBu 3<br />
Pancrazi, A. <strong>et</strong>. <strong>al</strong>. T<strong>et</strong>rahedron 1996, 52, 6613.<br />
E<br />
R