Boron tribromide → HCID 13091179, compound

HRID 1902656Notes

Reaction equation

HRID 1902656 reaction equation
B(Br)(Br)Br.C[O:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[C:13]1[C:14](=[O:24])[CH:15]=[C:16]([C:19]([O:21][CH2:22][CH3:23])=[O:20])[O:17][CH:18]=1>C(Cl)Cl.O>[OH:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1[C:13]1[C:14](=[O:24])[CH:15]=[C:16]([C:19]([O:21][CH2:22][CH3:23])=[O:20])[O:17][CH:18]=1

Participants

5

Reactant 2

HCID 25134Boron tribromideHCID 13091152HCID 13091152, compound

Product 1

HCID 13091179HCID 13091179, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

Boron tribromide (3.0 ml) was added dropwise to a stirred solution of ethyl 5-(2-methoxyphenyl)-4-oxo-4H-pyran-2-carboxylate (3.2 g) in methylene chloride (100 ml) at 5°-10° C. The mixture was stirred for 2 hours at room temperature, then cooled to 5° C. and carefully diluted with water (50 ml). The solid title product was recrystallised from ethanol (mp 187°-189° C.).

Workup

  1. temperaturecooled to 5° C.
  2. customThe solid title product was recrystallised from ethanol (mp 187°-189° C.)

Sources & evidence

ORD record
ord-47cc60e7f85c408197a83e325fcdc6fd
Source dataset
uspto-grants-1982_12
Patent number
US04364956

Reaction notes

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