The reduction of carboxylic acids to the corresponding alcohols has been performed with a variety of metal hydrides and complex metal hydrides, such as LiAM4, and its alkoxy derivatives,'NaBH,-Lewis acids? boranes, and combinations of borane-Lewis acids: The selective reduction of highly functionalized aromatic carboxylic acids with borane complexes is still not very well studied in the literature. During the recent synthesis of an important ...