1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (R)-ethyl 4-(3'-chlorobiphenyl-4-yl)-3-(2-(ethoxycarbonylamino)acetamido)butanoate

HRID 70844Notes

Reaction equation

HRID 70844 reaction equation
Cl.[NH2:2][C@H:3]([CH2:10][C:11]1[CH:16]=[CH:15][C:14]([C:17]2[CH:22]=[CH:21][CH:20]=[C:19]([Cl:23])[CH:18]=2)=[CH:13][CH:12]=1)[CH2:4][C:5]([O:7][CH2:8][CH3:9])=[O:6].[CH2:24]([O:26][C:27]([NH:29][CH2:30][C:31](O)=[O:32])=[O:28])[CH3:25].CCN=C=NCCCN(C)C.CCN(C(C)C)C(C)C.C1C=NC2N(O)N=NC=2C=1>CN(C=O)C.O>[Cl:23][C:19]1[CH:18]=[C:17]([C:14]2[CH:15]=[CH:16][C:11]([CH2:10][C@@H:3]([NH:2][C:31](=[O:32])[CH2:30][NH:29][C:27]([O:26][CH2:24][CH3:25])=[O:28])[CH2:4][C:5]([O:7][CH2:8][CH3:9])=[O:6])=[CH:12][CH:13]=2)[CH:22]=[CH:21][CH:20]=1

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 81531DiisopropylethylamineHCID 96472Glycine, N-(ethoxycarbonyl)-HCID 181649HOAtHCID 86648190(R)-ethyl 3-amino-4-(3'-chlorobiphenyl-4-yl)butanoate hydrochloride

Product 1

HCID 59607590(R)-ethyl 4-(3'-chlorobiphenyl-4-yl)-3-(2-(ethoxycarbonylamino)acetamido)butanoateYield 73.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of (R)-ethyl 3-amino-4-(3′-chlorobiphenyl-4-yl)butanoate hydrochloride (173 mg, 0.488 mmol), 2-(ethoxycarbonylamino)acetic acid (86 mg, 0.488 mmol), EDCI (140 mg, 0.732 mmol), DIPEA (0.128 ml, 0.732 mmol) and HOAt (100 mg, 0.732 mmol) in DMF (2.5 ml) is allowed to stir at room temperature for 1 hour. The reaction mixture is diluted with water, and then the precipitated solid is collected on a funnel, washed with H2O, and dried under reduced pressure to give crude. The obtained residue is purified by silica gel flash column chromatography (heptane/EtOAc=100:0 to 0:100) to give (R)-ethyl 4-(3′-chlorobiphenyl-4-yl)-3-(2-(ethoxycarbonylamino)acetamido)butanoate (161 mg); HPLC retention time=1.16 minutes (condition B); MS (m+1)=447.3; 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 1.25 (t, J=7.07 Hz, 3 H) 1.29 (t, J=7.07 Hz, 3 H) 2.50 (A of ABX, Jab=16.2 Hz, Jax=5.3 Hz, 1 H) 2.54 (B of ABX, Jab=16.2 Hz, Jbx=5.3 Hz, 1 H) 2.89 (A of ABX, Jab=13.6 Hz, Jax=7.8 Hz, 1 H) 2.99 (B of ABX, Jab=13.6 Hz, Jbx=6.6 Hz, 1 H) 3.80 (be d, J=5.8 Hz, 2 H) 4.12-4.23 (m, 4 H) 4.48-4.56 (m, 1 H) 5.15 (br s, 1 H) 6.64 (br d, J=8.8 Hz, 1 H) 7.25-7.27 (m, 2 H) 7.29-7.38 (m, 2 H) 7.43-7.46 (m, 1 H) 7.49-7.52 (m, 2 H) 7.55-7.56 (m, 1 H).

Workup

  1. customthe precipitated solid is collected on a funnel
  2. washwashed with H2O
  3. customdried under reduced pressure
  4. customto give crude
  5. customThe obtained residue is purified by silica gel flash column chromatography (heptane/EtOAc=100:0 to 0:100)

Sources & evidence

ORD record
ord-2293d6302fcd4c918e773020c3e57051
Source dataset
uspto-grants-2014_09
Patent number
US08822534B2

Reaction notes

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