Cyclopentylacetic acid → HCID 86714411, compound

HRID 1750198Notes

Reaction equation

HRID 1750198 reaction equation
[CH:1]1([CH2:6][C:7]([OH:9])=O)[CH2:5][CH2:4][CH2:3][CH2:2]1.C1C=CC2N(O)N=NC=2C=1.CCN(C(C)C)C(C)C.[CH3:29][O:30][C:31](=[O:45])[C:32]1[CH:37]=[CH:36][C:35]([NH:38][CH:39]([CH2:42][CH3:43])[CH2:40][CH3:41])=[C:34]([NH2:44])[CH:33]=1>CN(C=O)C.O.C(Cl)CCl>[CH3:29][O:30][C:31](=[O:45])[C:32]1[CH:37]=[CH:36][C:35]([NH:38][CH:39]([CH2:40][CH3:41])[CH2:42][CH3:43])=[C:34]([NH:44][C:7](=[O:9])[CH2:6][CH:1]2[CH2:2][CH2:3][CH2:4][CH2:5]2)[CH:33]=1

Participants

8

Reactant 4

HCID 71606Cyclopentylacetic acidHCID 757711-HydroxybenzotriazoleHCID 81531Diisopropylethylamine2×HCID 61311526Methyl 3-amino-4-(pentan-3-ylamino)benzoate

Product 1

HCID 86714411HCID 86714411, compoundYield 73%

Reagents, catalysts & solvents 3

HCID 111,2-DichloroethaneSolventHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a solution of 16.41 g of cyclopentyl-acetic acid in 600 ml of dry DMF 17.30 g of HOBT, 24.54 g of EDC and 30 ml of DIPEA were added at 0° C. After 1 h 27.51 g of 3-amino-4-(1-ethyl-propylamino)-benzoic acid methyl ester and 30 ml of DIPEA were added and the reaction was stirred at rt for 16 h. The reaction was then poured into water and extracted with ethyl acetate three times. The combined organic phases were washed with saturated aqueous sodium bicarbonate solution and brine, dried over magnesium sulphate and concentrated. The crude product was purified by crystallization from diisopropylether to yield 29.35 g (73%) of 3-(2-cyclopentyl-acetylamino)-4-(1-ethyl-propylamino)-benzoic acid methyl ester as an off-white solid.

Workup

  1. extractionextracted with ethyl acetate three times
  2. washThe combined organic phases were washed with saturated aqueous sodium bicarbonate solution and brine
  3. dry with materialdried over magnesium sulphate
  4. concentrationconcentrated
  5. customThe crude product was purified by crystallization from diisopropylether

Sources & evidence

ORD record
ord-1567141a3c60491ca2bdef57e9697e97
Source dataset
uspto-grants-2015_10
Patent number
US09156796B2

Reaction notes

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