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. Author manuscript; available in PMC: 2009 Jan 8.
Published in final edited form as: J Am Chem Soc. 2006 Sep 13;128(36):11906–11915. doi: 10.1021/ja062364i

Table 2a.

graphic file with name nihms82032f17.jpg
entry donor acceptor reagent 36 (%) 39 (%)
1 34 (Bu3SnO-QA-Me) Ph2SO, Tf2O 79 (α) –
2 38 12 TBSOTf 78 (α) –
3 38 12 BF3·OEt2 33 (β) 18 (α)
a

Reagents and conditions: (a) CCl3CN, DBU, CH2Cl2 (96%); (b) 12 or 37, “reagents,” CH2Cl2.