The reaction of hypervalent tin reagents (n-Bu 4 N) + (R 1 3 SnF 2 ) -(R 1 ) aryl, benzyl) with vinyl and aryl triflates affords the corresponding cross-coupling products in good yields and short reaction times. The method described represents an important improvement over the classical Stille reaction. The hypervalent reagents are easily prepared by reaction of R 1 3 SnF and n-Bu 4 NF.
The benzylation of aryl triflates can be achieved by cross-coupling between aryl triflates and the new hypervalent tin reagent (n-Bu(4)N)(+)(Bn(3)SnF(2))(-).
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