Pyridine → (S)-2-Methoxycarbonylamino-3-methylbutyric Acid (R)-3-[N-(5'-chloro-2'-fluorobiphenyl-4-ylmethyl)-N'-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionyloxymethyl Ester

HRID 541524Notes

Reaction equation

HRID 541524 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([F:32])=[C:6]([C:8]2[CH:13]=[CH:12][C:11]([CH2:14][N:15]([CH2:26][C@@H:27]([OH:31])[C:28]([OH:30])=[O:29])[NH:16][C:17]([C:19]3[O:23][N:22]=[C:21]([O:24][CH3:25])[CH:20]=3)=[O:18])=[CH:10][CH:9]=2)[CH:7]=1.Cl[CH2:34][O:35][C:36](=[O:46])[C@@H:37]([NH:41][C:42]([O:44][CH3:45])=[O:43])[CH:38]([CH3:40])[CH3:39].[Na+].[I-].N1C=CC=CC=1>CN(C=O)C.O>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([F:32])=[C:6]([C:8]2[CH:9]=[CH:10][C:11]([CH2:14][N:15]([CH2:26][C@@H:27]([OH:31])[C:28]([O:30][CH2:34][O:35][C:36](=[O:46])[C@@H:37]([NH:41][C:42]([O:44][CH3:45])=[O:43])[CH:38]([CH3:40])[CH3:39])=[O:29])[NH:16][C:17]([C:19]3[O:23][N:22]=[C:21]([O:24][CH3:25])[CH:20]=3)=[O:18])=[CH:12][CH:13]=2)[CH:7]=1

Participants

7

Reactant 4

HCID 1049PyridineHCID 5238Sodium IodideHCID 67972936(R)-3-[N-(5'-Chloro-2'-fluorobiphenyl-4-ylmethyl)-N'-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionic AcidHCID 86669865(S)-chloromethyl 2-((methoxycarbonyl)amino)-3-methylbutanoate

Product 1

HCID 86705102(S)-2-Methoxycarbonylamino-3-methylbutyric Acid (R)-3-[N-(5'-chloro-2'-fluorobiphenyl-4-ylmethyl)-N'-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionyloxymethyl EsterYield 0%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
25 °C

Procedure

A mixture of (R)-3-[N-(5′-chloro-2′-fluorobiphenyl-4-ylmethyl)-N′-(3-methoxyisoxazole-5-carbonyl)hydrazino]-2-hydroxypropionic acid (200 mg, 430 mmol), (S)-2-methoxycarbonylamino-3-methylbutyric acid chloromethyl ester (193 mg, 860 mmol), NaI (129 mg, 860 μmol) and pyridine (136 mg, 1.7 mmol) in DMF (5.0 mL) was stirred at 25° C. overnight. The mixture was then poured into water (30 mL) and extracted with EtOAc (3×20 mL). The combined organic layers were washed with saturated aqueous NaCl (30 mL), dried over anhydrous Na2SO4, and concentrated in vacuo. The residue was purified by column chromatography (PE:EtOAc=1:1) to yield the title compound as a colorless liquid (7 mg). LC-MS: 651.1 [M+H]+. 1H NMR (CD3OD, 400 MHz): δ 0.95-0.97 (m, 6H), 2.06-2.14 (m, 1H), 3.34-3.39 (m, 2H), 3.69 (s, 3H), 3.98 (s, 3H), 4.08-4.11 (m, 1H), 4.22-4.24 (m, 2H), 4.38-4.40 (m, 1H), 5.78-5.91 (m, 2H), 6.54 (s, 1H), 7.18-7.22 (m, 1H), 7.34-7.36 (m, 1H), 7.46-7.55 (m, 5H).

Workup

  1. extractionextracted with EtOAc (3×20 mL)
  2. washThe combined organic layers were washed with saturated aqueous NaCl (30 mL)
  3. dry with materialdried over anhydrous Na2SO4
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography (PE:EtOAc=1:1)

Sources & evidence

ORD record
ord-0eeac375a9544f8797c633f22cc02276
Source dataset
uspto-grants-2014_10
Patent number
US08871792B2

Reaction notes

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