1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → methyl 2-hydroxy-5-(5Z,8Z,11Z,14Z)-icosa-5,8,11, 14-tetraenamidobenzoate

HRID 919150Notes

Reaction equation

HRID 919150 reaction equation
[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([OH:12])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].[C:13](O)(=[O:33])[CH2:14][CH2:15][CH2:16]/[CH:17]=[CH:18]\[CH2:19]/[CH:20]=[CH:21]\[CH2:22]/[CH:23]=[CH:24]\[CH2:25]/[CH:26]=[CH:27]\[CH2:28][CH2:29][CH2:30][CH2:31][CH3:32].CCN=C=NCCCN(C)C.CN(C1C=CC=CN=1)C>ClCCl>[OH:12][C:5]1[CH:4]=[CH:3][C:2]([NH:1][C:13](=[O:33])[CH2:14][CH2:15][CH2:16]/[CH:17]=[CH:18]\[CH2:19]/[CH:20]=[CH:21]\[CH2:22]/[CH:23]=[CH:24]\[CH2:25]/[CH:26]=[CH:27]\[CH2:28][CH2:29][CH2:30][CH2:31][CH3:32])=[CH:11][C:6]=1[C:7]([O:9][CH3:10])=[O:8]

Participants

6

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 218852-DimethylaminopyridineHCID 135127Methyl 5-amino-2-hydroxybenzoateHCID 444899Arachidonic Acid

Product 1

HCID 67493711methyl 2-hydroxy-5-(5Z,8Z,11Z,14Z)-icosa-5,8,11, 14-tetraenamidobenzoateYield 82.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of methyl 5-amino-2-hydroxybenzoate (0.27 g, 1.6 mmol) in dichloromethane (10 mL) was added arachidonic acid (0.5 g, 1.6 mmol), EDCI (0.32 g, 1.7 mmol) and dimethylaminopyridine (0.020 g, 0.2 mmol). The reaction was stirred (RT, 2 h), and then partitioned between CH2Cl2 and brine. The aqueous layer was extracted with CH2Cl2, and the combined organic layers were washed with 1 N HCl, water, saturated aqueous NaHCO3 and water, and then dried over MgSO4. The crude product was purified by silica chromatography (0-5% MeOH/CH2Cl2) to afford 0.6 g of methyl 2-hydroxy-5-(5Z,8Z,11Z,14Z)-icosa-5,8,11,14-tetraenamidobenzoate as a brown oil. Mass calculated for C28H39NO4=453.61. found: [M+H]+=454.3.

Workup

  1. custompartitioned between CH2Cl2 and brine
  2. extractionThe aqueous layer was extracted with CH2Cl2
  3. washthe combined organic layers were washed with 1 N HCl, water, saturated aqueous NaHCO3 and water
  4. dry with materialdried over MgSO4
  5. customThe crude product was purified by silica chromatography (0-5% MeOH/CH2Cl2)

Sources & evidence

ORD record
ord-d62362fa2c394c379abe08750bb5807c
Source dataset
uspto-grants-2016_03
Patent number
US09272984B2

Reaction notes

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