| Identification | Back Directory | [Name]
7-Bromo-4-chromanone | [CAS]
18442-22-3 | [Synonyms]
7-Bromo Chromonone
7-Bromo-4-chromanone
7-BroMo-4-chroManone 97%
7-Bromochroman-4-one C9H7BrO2
7-bromo-2,3-dihydrochromen-4-one
7-bromo-2,3-dihydrobenzopyran-4-one
7-BROMOCHROMAN-4-ONE, CAS: 18442-22-3
7-Bromo-2,3-dihydro-4H-1-benzopyran-4-one
7-broMo-3,4-dihydro-2H-1-benzopyran-4-one
4H-1-Benzopyran-4-one, 7-bromo-2,3-dihydro- | [EINECS(EC#)]
1308068-626-2 | [Molecular Formula]
C9H7BrO2 | [MDL Number]
MFCD09744055 | [MOL File]
18442-22-3.mol | [Molecular Weight]
227.05 |
| Hazard Information | Back Directory | [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%. |
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