1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-Nitro-2-(3,5-dimethylphenyl)benzoyl methionine methyl ester

HRID 1739143Notes

Reaction equation

HRID 1739143 reaction equation
[N+:1]([C:4]1[CH:12]=[CH:11][C:7]([C:8]([OH:10])=O)=[C:6]([C:13]2[CH:18]=[C:17]([CH3:19])[CH:16]=[C:15]([CH3:20])[CH:14]=2)[CH:5]=1)([O-:3])=[O:2].Cl.[CH3:22][O:23][C:24](=[O:31])[C@H:25]([CH2:27][CH2:28][S:29][CH3:30])[NH2:26].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1.COC(=O)[C@H](CCSC)N(C(=O)C1C=CC(N)=CC=1)C(OC(C)(C)C)=O>C(Cl)Cl.CCN(CC)CC>[CH3:22][O:23][C:24](=[O:31])[C@H:25]([CH2:27][CH2:28][S:29][CH3:30])[NH:26][C:8](=[O:10])[C:7]1[CH:11]=[CH:12][C:4]([N+:1]([O-:3])=[O:2])=[CH:5][C:6]=1[C:13]1[CH:18]=[C:17]([CH3:19])[CH:16]=[C:15]([CH3:20])[CH:14]=1

Participants

8

Reactant 5

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 11435579L-Methionine, methyl ester, hydrochlorideHCID 234362252-(3,5-Dimethylphenyl)-4-nitrobenzoic acidHCID 67564255N-BOC-4-aminobenzoyl methionine methyl ester

Product 1

HCID 186667634-Nitro-2-(3,5-dimethylphenyl)benzoyl methionine methyl esterYield 58.4%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8471TriethylamineSolvent

Procedure

4-nitro-2-(3,5-dimethylphenyl)benzoic acid (0.15 g, 0.55 mmol), methionine methyl ester hydrochloride salt (0.11 g, 0.55 mmol), EDCI (0.11 g, 0.55 mmol), HOBT (0.07 g, 0.55 mmol) and Et3N (0.08 ml) in dry CH2Cl2 (2.2 ml) were reacted and worked up according to the procedure for N-BOC-4-aminobenzoyl methionine methyl ester in Example 1. After recrystallization from ethyl acetate and hexanes, 0.13 g (58.4%) of pure product was isolated. mp 122-124° C.; 1H NMR (CDCl3) 1.2-1.84 (1H, m), 1.85-1.97 (1H, m), 2.01 (3H, s), 2.05 (3H, t, J=7.7 Hz), 2.38 (6H, s), 3.70 (3H, s), 4.67-4.74 (1H, m), 6.03 (1H, d, J=7.9 Hz), 7.05 (2H, s), 7.09 (1H, s), 7.84-7.87 (1H, m), 7.84-7.87 (1H, m), 8.23-8.26 (2H, m); 13C NMR (CDCl3), 15.20, 21.26, 29.22, 31.15, 51.79, 52.57, 122.07, 25.11, 126.27, 130.03, 130.53, 137.77, 138.82, 140.29, 141.56, 148.41, 167.14, 171.53.

Workup

  1. customAfter recrystallization from ethyl acetate and hexanes

Sources & evidence

ORD record
ord-bb3d2e8fd31f4079999a359ea9bd69fa
Source dataset
uspto-grants-1999_10
Patent number
US05965539

Reaction notes

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