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The regioselective allylation of 4-silyloxy quinolinium triflates with allyltri-n-butyltin has been performed to give 2allyl-4-silyloxy-1,2-dihydroquinolines with excellent yields. Similiar results were obtained with 4-silyloxy benzopyrylium triflates and 4-silyloxy benzothiopyrylium triflates.

Efficient allylation of 4-silyloxy quinolinium triflates and other positively charged heteroaromatic systems