for C-H allylation of aryl oxazolines using allylic alcohols as the coupling partner. The present transformation unravels the unusual reactivity of allylic alcohols in the synthesis of 4-methyleneisochroman-1-ones and C-H-allylated products. A complete switch in the product selectivity was observed with substrate control and tuning the reaction conditions. The approach employs allylalcohols as an efficient