| Abstract
| - A three-step route of converting allylsilanes to functionalized allenes was developed. Thermaldecomposition of 1,1-dibromo-2-(silylmethyl)cyclopropanes, which were quantitatively prepared bytreatment of allylsilane derivatives with CHBr3/KOtBu, afforded substituted 2-bromo-1,3-butadieneswith elimination of bromosilanes. The Pd-catalyzed reaction of the bromodienes with softnucleophiles gave the allene derivatives. Previously inaccessible tri- and tetrasubstituted allenescan be prepared by this method as well.
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