N,N-Dimethylethylenediamine → 2-[(2-dimethylamino-ethylcarbamoyl)-methyl]-4-methyl-1H-pyrrole-3-carboxylic acid ethyl ester

HRID 2365126Notes

Reaction equation

HRID 2365126 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[C:10]([CH3:11])=[CH:9][NH:8][C:7]=1[CH2:12][C:13]([OH:15])=O)=[O:5])[CH3:2].[CH3:16][N:17]([CH3:21])[CH2:18][CH2:19][NH2:20].Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1>CN(C)C=O.ClCCl.O>[CH2:1]([O:3][C:4]([C:6]1[C:10]([CH3:11])=[CH:9][NH:8][C:7]=1[CH2:12][C:13](=[O:15])[NH:20][CH2:19][CH2:18][N:17]([CH3:21])[CH3:16])=[O:5])[CH3:2]

Participants

8

Reactant 4

HCID 66053N,N-DimethylethylenediamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 498403282-carboxymethyl-4-methyl-1H-pyrrole-3-carboxylic acid ethyl ester

Product 1

HCID 666081152-[(2-dimethylamino-ethylcarbamoyl)-methyl]-4-methyl-1H-pyrrole-3-carboxylic acid ethyl esterYield 998.8%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A stirred solution of 2-carboxymethyl-4-methyl-1H-pyrrole-3-carboxylic acid ethyl ester (2.11 g, 10 mmol) in N,N-dimethylformamide (5 ml) and dichloromethane (50 ml) was added with N*1*,N*1*-dimethyl-ethane-1,2-diamine (968 mg, 11 mmol), N-ethyl-N′-(dimethylaminopropyl)-carbodiimide hydrochloride (5 g, 26 mmol) and 1-hydroxybenzotriazol (1.5 g, 11 mmol) in an ice-water bath. Upon completion of the addition, the mixture was stirred at room temperature overnight, added with cold water (50 ml) and extracted with dichloromethane (50 ml×3). The combined organic extracts were washed with saturated sodium bicarbonate solution (50 ml), water (50 ml), brine (50 ml), dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to give 2-[(2-dimethylamino-ethylcarbamoyl)-methyl]-4-methyl-1H-pyrrole-3-carboxylic acid ethyl ester (28.1 g, 90.9%) as a colorless oil which was used as such.

Workup

  1. additionUpon completion of the addition
  2. extractionextracted with dichloromethane (50 ml×3)
  3. washThe combined organic extracts were washed with saturated sodium bicarbonate solution (50 ml), water (50 ml), brine (50 ml)
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-c6e22a153a8741369455d031f020cc79
Source dataset
uspto-grants-2014_04
Patent number
US08697692B2

Reaction notes

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