Scheme 7.
Synthesis of the Sulfone Coupling Partner
Entry | Conditions | Result |
---|---|---|
1 |
TfOH (50 mol %), CH2Cl2 |
Decomposition |
2 |
TfOH (5 mol %), CH2Cl2-hexane |
Decomposition |
3 |
Cu(OTf)2, PhMe |
No Reaction |
4 |
BF3·OEt2 |
Decomposition |
5 | Allyl bromide, Ag2O, CaSO4, PhH | No Reaction |
6 | Et2Zn, Pd(OAc)2, PPh3, allyl acetate, THF | 61% of 39 |