Boron tribromide → HCID 13091184, compound

HRID 1902658Notes

Reaction equation

HRID 1902658 reaction equation
[CH3:1][O:2][C:3]1[CH:22]=[CH:21][C:6]([C:7]([C:9]2[C:10](=[O:20])[CH:11]=[C:12]([C:15]([O:17]CC)=[O:16])[O:13][CH:14]=2)=[O:8])=[CH:5][CH:4]=1.B(Br)(Br)Br>>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([C:7]([C:9]2[C:10](=[O:20])[CH:11]=[C:12]([C:15]([OH:17])=[O:16])[O:13][CH:14]=2)=[O:8])=[CH:21][CH:22]=1

Participants

3

Reactant 2

HCID 25134Boron tribromideHCID 13091160HCID 13091160, compound

Product 1

HCID 13091184HCID 13091184, compound

Procedure

Treatment of ethyl 5-(4-methoxybenzoyl)-4-oxo-4H-pyran-2-carboxylate with boron tribromide under the conditions described in Example 45 caused preferential cleavage of the ester group to give the title product (mp 185°-190° C. with decomposition).

Sources & evidence

ORD record
ord-3de6a4f0cc494fb386f5c3d84de57e6b
Source dataset
uspto-grants-1982_12
Patent number
US04364956

Reaction notes

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