Nickel-Catalyzed and Tetrahydroxydiboron-Mediated Allylation of Aldehydes with Allyl Alcohols.

The allylation of carbonyl compounds to form homoallylic alcohols represents one of the significant synthetic transformations. In this letter, we describe a new method for the allylation of aldehydes with allyl alcohols facilitated by nickel chloride and tetrahydroxydiboron. This approach offers a mild and straightforward procedure for the synthesis of homoallylic alcohols from aldehydes and ketones.