5 CH,-(CHz],,-OH Ph-FH 0.5 RT 2 days wo reaction a Time required for the disappearance of starting mate-rial. electronic considerations may account for this phenomenon, one has to consider, as well, certain of these substituents as potential competitive coordination sites (entries 6 and 8) for zinc iodide. This might interfere in the overall process and decrease the reaction rate. Basic substituents such as amides and amines present certain difficulties. In ...