Acceleration of the conjugate addition of diethyl zinc to enones by either Cu(OTf) 2 or trivalent phosphorus ligands
The conjugate addition of diethyl zinc to enones under copper catalysis occurs well with copper (II) triflate. Other copper salts need a phosphine or phosphite ligand to be efficient. The best combination is copper (II) triflate and triethyl phosphite. A very small amount of copper (II) triflate (0....
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| Published in | Tetrahedron letters Vol. 38; no. 44; pp. 7745 - 7748 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.11.1997
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| Abstract | The conjugate addition of diethyl zinc to enones under copper catalysis occurs well with copper (II) triflate. Other copper salts need a phosphine or phosphite ligand to be efficient. The best combination is copper (II) triflate
and
triethyl phosphite. A very small amount of copper (II) triflate (0.5%) and triehyl phosphite (1%) are enough for high yields.
several other examples of cyclic and acyclic enones, alkylidene malonates and nitro olefins |
|---|---|
| AbstractList | The conjugate addition of diethyl zinc to enones under copper catalysis occurs well with copper (II) triflate. Other copper salts need a phosphine or phosphite ligand to be efficient. The best combination is copper (II) triflate
and
triethyl phosphite. A very small amount of copper (II) triflate (0.5%) and triehyl phosphite (1%) are enough for high yields.
several other examples of cyclic and acyclic enones, alkylidene malonates and nitro olefins |
| Author | Vastra, J. Mangeney, P. Alexakis, A. |
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| Title | Acceleration of the conjugate addition of diethyl zinc to enones by either Cu(OTf) 2 or trivalent phosphorus ligands |
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