Bromine → Methyl 4-bromo-7-methoxy-2H-1,3-benzodioxole-5-carboxylate

HRID 982519Notes

Reaction equation

HRID 982519 reaction equation
[CH3:1][O:2][C:3]1[C:4]2[O:15][CH2:14][O:13][C:5]=2[CH:6]=[C:7]([CH:12]=1)[C:8]([O:10][CH3:11])=[O:9].[Br:16]Br>C(O)(=O)C>[Br:16][C:6]1[C:5]2[O:13][CH2:14][O:15][C:4]=2[C:3]([O:2][CH3:1])=[CH:12][C:7]=1[C:8]([O:10][CH3:11])=[O:9]

Participants

4

Reactant 2

HCID 24408BromineHCID 601780Methyl 3,4-methylenedioxy-5-methoxybenzoate

Product 1

HCID 11449108Methyl 4-bromo-7-methoxy-2H-1,3-benzodioxole-5-carboxylateYield 51%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

In 35 ml of acetic acid was dissolved 10.5 g of methyl 5-methoxy-3,4-methylenedioxybenzoate, and a solution of bromine (formed by diluting 8 g of bromine with 25 ml of acetic acid) was dropped into the solution over a period of 1 hour. The mixture was stirred at room temperature for 10 hours and the reaction liquid was poured into ice water, and the formed precipitate was recovered by filtration and recrystallized from ethanol to obtain methyl 2-bromo-5-methoxy-3,4-methylenedioxybenzoate (the yield was 51%).

Workup

  1. customthe reaction liquid
  2. filtrationthe formed precipitate was recovered by filtration
  3. customrecrystallized from ethanol

Sources & evidence

ORD record
ord-99cd3c77014d49e3a0a074efdb392fa8
Source dataset
uspto-grants-1991_02
Patent number
US04996331

Reaction notes

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