Boronic Esters (also Named Boronate Esters)
Boronic esters are esters formed between a boronic acid and an alcohol.
| Compound | General formula | General structure |
|---|---|---|
| Boronic acid | RB(OH)2 |
|
| Boronic ester | RB(OR)2 |
|
| Comparison between boronic acids and boronic esters | ||
The compounds can be obtained from borate esters by condensation with alcohols and diols. Phenylboronic acid can be selfcondensed to the cyclic trimer called triphenyl anhydride or triphenylboroxin.
| Boronic ester | Diol | Structural formula | Molar mass | CAS number | Boiling point (°C) |
|---|---|---|---|---|---|
| Allylboronic acid pinacol ester | pinacol | 168.04 | 72824-04-5 | 50–53 (5 mmHg) | |
| Phenyl boronic acid trimethylene glycol ester | trimethylene glycol | 161.99 | 4406-77-3 | 106 (2 mm Hg) | |
| Diisopropoxymethylborane | isopropanol | 144.02 | 86595-27-9 | 105 -107 | |
| Representative boronic esters | |||||
Compounds with 5-membered cyclic structures containing the C-O-B-O-C linkage are called dioxaborolanes and those with 6-membered rings dioxaborinanes.
Read more about this topic: Boronic Acid
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