Tetrahedron letters

Allylation of acetals and ketals with allyltrimethylsilane catalyzed by the mixed Lewis acid system AlBr 3/CuBr

ME Jung, A Maderna

Index: Jung, Michael E.; Maderna, Andreas Tetrahedron Letters, 2004 , vol. 45, # 27 p. 5301 - 5304

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Citation Number: 15

Abstract

The synthesis of homoallyl ethers from various acetals and a cyclic ketal with allyltrimethylsilane catalyzed by aluminum bromide in the presence of trimethylaluminum as a desiccant is described. We found that the addition of a catalytic amount of copper (I) bromide accelerates the allylation reactions to afford the homoallyl ether derivatives in good to excellent yield.