2-BROMO-1,3,2-BENZODIOXABOROLE Chemical Properties

Melting point:

51-53 °C(lit.)

Boiling point:

76 °C9 mm Hg(lit.)

Density 

1.67±0.1 g/cm3(Predicted)

Flash point:

107 °F

storage temp. 

2-8°C

solubility 

sol dichloromethane

form 

powder to lump

color 

White to Amber to Dark purple

BRN 

2445073

CAS DataBase Reference

51901-85-0

Safety Information

Hazard Codes 

C

Risk Statements 

14-34-37

Safety Statements 

26-36/37/39-45

RIDADR 

UN 2925 4.1/PG 2

WGK Germany 

3

F 

8-10-21

HS Code 

2931.90.6000

HazardClass 

4.1

PackingGroup 

III

MSDS

• Language:English Provider:SigmaAldrich

2-BROMO-1,3,2-BENZODIOXABOROLE Usage And Synthesis

Uses

B-Bromocatecholborane is a mild Lewis acid capable of selective cleavage of ether, ester and carbamate protecting groups; catalyst for Diels-Alder reactions.

Preparation

B-Bromocatecholborane can be conveniently prepared by treating Catechol with Boron Tribromide. The reagent is isolated by distillation as a moisture-sensitive, low-melting solid.

storage

B-Bromocatecholborane is a flammable solid, moisture sensitive; may be conveniently stored and dispensed as a 0.2 M solution in dichloromethane. If properly protected from moisture, these solutions are stable for a period of months^[1]. Use in a fume hood.

Purification Methods

Keep at 20o/15mm for some time and then fractionally distil. [Gerrard J Chem Soc 1529 1959, Beilstein 6 IV 5612.]

References

1. Boeckman Jr., R. K.; Potenza, J. C. TL 1985, 26, 1411.

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