7-bromochroman-4-one Chemical Properties

Boiling point:

336.6±42.0 °C(Predicted)

Density 

1.621±0.06 g/cm3(Predicted)

storage temp. 

2-8°C

Safety Information

HS Code 

2932990090

7-bromochroman-4-one Usage And Synthesis

Uses

Used as a intermediate for  R & D.

Synthesis

7-Bromochroman-4-one was synthesized by hydrogenation addition of 7-Bromo-benzopyrone catalyzed by Wilkinson's catalyst Rhodium( Ⅰ) tris( triphenylphosphine) chloride[Rh( PPh3)3Cl]. The structure was confirmed by1 H NMR and MS. The optimum reaction conditions for synthesizing 7-Bromochroman-4-one were as follows: 5 0. 329 mol,ethanol as the solvent,c( 5) =0. 4 mol·L- 1,4% mol Rh( PPh3)3Cl as the catalyst,under 0. 3 MPa of hydrogen pressure,at 70℃ for 20 h,the yield was 79. 8%.

7-bromochroman-4-one(18442-22-3)Related Product Information

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• 7-BROMOCHROMAN-4-AMINE HYDROCHLORIDE
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• 4-BROMO-2-HYDROXYACETOPHENONE