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. Author manuscript; available in PMC: 2013 Mar 5.
Published in final edited form as: Chemistry. 2012 Feb 3;18(10):2948–2960. doi: 10.1002/chem.201102898

Scheme 7.

Scheme 7

Synthesis of the Sulfone Coupling Partner

Entry Conditions Result
1 graphic file with name nihms370019t1.jpg
TfOH (50 mol %), CH2Cl2
Decomposition
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TfOH (5 mol %), CH2Cl2-hexane
Decomposition
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Cu(OTf)2, PhMe
No Reaction
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BF3·OEt2
Decomposition
5 Allyl bromide, Ag2O, CaSO4, PhH No Reaction
6 Et2Zn, Pd(OAc)2, PPh3, allyl acetate, THF 61% of 39