Sodium Hydroxide → Mcn 2891

HRID 1282366Notes

Reaction equation

HRID 1282366 reaction equation
[Cl:1][C:2]1[CH:23]=[CH:22][C:5]([C:6]([C:8]2[N:12]([CH3:13])[C:11]([CH:14]([CH3:20])[C:15]([O:17]CC)=[O:16])=[CH:10][C:9]=2[CH3:21])=[O:7])=[CH:4][CH:3]=1.[OH-].[Na+]>C(O)C>[Cl:1][C:2]1[CH:23]=[CH:22][C:5]([C:6]([C:8]2[N:12]([CH3:13])[C:11]([CH:14]([CH3:20])[C:15]([OH:17])=[O:16])=[CH:10][C:9]=2[CH3:21])=[O:7])=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 118464ethyl 5-(4-chlorobenzoyl)-alpha,1,4-trimethyl-1H-pyrrole-2-acetate

Product 1

HCID 198126Mcn 2891

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

An ethanol solution of 2.9 g. (0.0087 mole) of ethyl 5-(p-chlorobenzoyl)1,4,α-trimethylpyrrole-2-acetate is added to 17.5 ml. 0.5 N sodium hydroxide solution, and the mixture is heated under reflux for one hour. The ethanol is evaporated in vacuo, and the solution poured into dilute hydrochloric acid. The precipitated solid is collected by filtration and recrystallized from ether-cyclohexane to give 5-(p-chlorobenzoyl)-1,4,α-trimethylpyrrole-2-acetic acid as a white solid, m.p. 153-154° C. Anal. Calcd. for C16H16ClNO3: C, 62.85; H, 5.29; N, 4.58%. Found: C, 62.74; H, 5.22; N, 4.47%.

Workup

  1. temperatureunder reflux for one hour
  2. customThe ethanol is evaporated in vacuo
  3. additionthe solution poured into dilute hydrochloric acid
  4. filtrationThe precipitated solid is collected by filtration
  5. customrecrystallized from ether-cyclohexane

Sources & evidence

ORD record
ord-e3fdd6f3c7ab490c91277f440726648c
Source dataset
uspto-grants-2002_09
Patent number
US06455703B2

Reaction notes

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