Abstract
Reaction of trialkylboranes (I and II) with an aromatic aldehyde (III, IV and V) gave the styrene derivatives which were alkylated at the carbon atom of the aldehyde group. Reaction of I and II with carboxylic acid (XII to XV), carboxylic anhydride (XXIV to XXVII), and carbonyl chloride (XXVIII to XXXI) afforded the corresponding esters. In the reaction of trihexylborane (II) with benzoic acid (XII), the formation of hexyl benzoate (XX) was inhibited by the presence of a radical scavenger (phenothiazine).
