Copper-catalyzed gamma-selective coupling between gamma-silylated propargylic phosphates and alkylboron compounds (alkly-9-BBN, prepared by hydroboration of alkenes with 9-BBN-H) Produced allenylsilanes with exceptional selectivity. The reaction tolerated various functional groups in both the alkylboranes and the propargylic Phosphates to afford functionalized allenylsilanes. The reaction of enantioenriched gamma-silylated propargylic: phosphates proceeded with excellent: 1,3-anti stereoselectivity to give axially. chiral allenylsilanes.