Organoboron compounds. Part IX. Diborinic acids and their derivatives
Abstract
By treatment with Grignard reagents esters of the diboronic acids (HO)2B·R′·B(OH)2 are converted into the diborinic acids RB(OH)·R′·B(OH)R, which are isolated in the form of their bis-2-aminoethyl esters. Acidification of the latter enables some of the free diborinic acids to be obtained. The hydrolysis, oxidation, and dehydration of the diborinic acids are described.