2,5-Thiophenedicarboxylic acid → (R)-1-[5-[(R)-2-Benzyloxycarbonyl-pyrrolidine-1-carbonyl]-thiophene-2-carbonyl]-pyrrolidine-2-carboxylic acid benzyl ester

HRID 1636138Notes

Reaction equation

HRID 1636138 reaction equation
Cl.[CH2:2]([O:9][C:10](=[O:16])[C@H:11]1[CH2:15][CH2:14][CH2:13][NH:12]1)[C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.[S:17]1[C:21]([C:22]([OH:24])=O)=[CH:20][CH:19]=[C:18]1[C:25]([OH:27])=O>CCOC(C)=O>[CH2:2]([O:9][C:10]([C@H:11]1[CH2:15][CH2:14][CH2:13][N:12]1[C:22]([C:21]1[S:17][C:18]([C:25]([N:12]2[CH2:13][CH2:14][CH2:15][C@@H:11]2[C:10]([O:9][CH2:2][C:3]2[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=2)=[O:16])=[O:27])=[CH:19][CH:20]=1)=[O:24])=[O:16])[C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1

Participants

4

Reactant 2

HCID 202732,5-Thiophenedicarboxylic acidHCID 22827650benzyl (2R)-pyrrolidine-2-carboxylate hydrochloride

Product 1

HCID 53673751(R)-1-[5-[(R)-2-Benzyloxycarbonyl-pyrrolidine-1-carbonyl]-thiophene-2-carbonyl]-pyrrolidine-2-carboxylic acid benzyl esterYield 84%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

Using General Procedure A with 2.0 g (8.2 mmol) D-Proline benzyl ester hydrochloride and 700 mg (4.1 mmol) thiophene-2,5-dicarboxylic acid afforded, after flash chromatography (EtOAc), 1.84 g (84%) of the title compound as a yellow crystalline solid. MS m/e (%): 564 (M+NH4+, 70), 547 (M+H+, 100).

Workup

  1. customafforded

Sources & evidence

ORD record
ord-17ec3c042fd24f0493eeb9658d082798
Source dataset
uspto-grants-2003_01
Patent number
US06512001B1

Reaction notes

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