Dialkylborinic acids

Dialkylborinic acids, amination reactions, 9, 188 Dialkylborinic esters, amination reactions, 9, 188 Dialkyl complexes... 

Although symmetrical dialkylborinic acids can be obtained from boron alkoxides or boronic esters and organolithium or RMgX reagents " , these compounds usually are more conveniently synthesized, either by partial hydrolysis of trialkylboranes , or by hydroboration of alkenes with monohalogenoboranes followed by hydrolysis (see also refs. 1-8, 5.3.2.4 and ref. 2, 5.3.2.4.1). Diarylborinic acids are prepared by the reaction of 2 mol of ArMgX with trialkoxyborane at low The products are... 

The starting dialkylhalogenoboranes and dialkylborinic acid esters can be obtained by hydroboration of olefins with monohalogenoboranes. The reagents are prepared by analogous methods as described for dihalogenoboranes or... 

The dialkylhalogenoboranes are transformed into the corresponding dialkylborinic acids and their esters by hydrolysis or alcoholysis. Dialkylpyrrolboranes are also used for this... 

The reaction undergone by alcohols with trialkyl- and triaryl-boranes in the presence of pivalic acid, to give borinic esters, and the thermal cyclization of bis(dialkylborinates) to boronates, are discussed briefly in Section II. Many borinates have been prepared in quantitative yield from mono-, di-, oligo-, and poly-saccharides,338,108 and mixed... 

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