Phenylacetyl chloride → (3R,4R)-3-({Isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-4-[(methyl-phenylacetyl-amino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 1158352Notes

Reaction equation

HRID 1158352 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][C@@H:11]([CH2:13][NH:14][CH3:15])[C@H:10]([CH2:16][N:17]([CH:34]([CH3:36])[CH3:35])[C:18](=[O:33])[C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH2:28][CH2:29][CH2:30][O:31][CH3:32])[CH:20]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:37]1([CH2:43][C:44](Cl)=[O:45])[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=1.C(N(CC)CC)C.C([O-])(O)=O.[Na+]>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:12][C@@H:11]([CH2:13][N:14]([CH3:15])[C:44](=[O:45])[CH2:43][C:37]2[CH:42]=[CH:41][CH:40]=[CH:39][CH:38]=2)[C@H:10]([CH2:16][N:17]([CH:34]([CH3:36])[CH3:35])[C:18](=[O:33])[C:19]2[CH:24]=[CH:23][C:22]([O:25][CH3:26])=[C:21]([O:27][CH2:28][CH2:29][CH2:30][O:31][CH3:32])[CH:20]=2)[CH2:9]1)=[O:7])([CH3:3])([CH3:4])[CH3:2]

Participants

6

Reactant 4

HCID 7679Phenylacetyl chlorideHCID 8471TriethylamineHCID 516892Sodium BicarbonateHCID 59512501(3R*,4R*)-3-({Isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-4-methylaminomethyl-pyrrolidine-1-carboxylic acid tert-butyl ester

Product 1

HCID 59512485(3R,4R)-3-({Isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-4-[(methyl-phenylacetyl-amino)-methyl]-pyrrolidine-1-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

To a solution of (3R,4R)-3-({isopropyl-[4-methoxy-3-(3-methoxy-propoxy)-benzoyl]-amino}-methyl)-4-methylaminomethyl-pyrrolidine-1-carboxylic acid tert-butyl ester (2 g, 3.35 mmol) in CH2Cl2 (25 mL), phenylacetyl chloride (0.53 mL, 4.02 mmol) and triethylamine (0.56 mL, 4.02 mmol) are added under N2 atmosphere at 0° C. The mixture is stirred 30 min at 0° C., then allowed to reach RT and further stirred for 1 h. The reaction mixture is diluted with CH2Cl2 and poured into an aqueous saturated solution of NaHCO3. The organic layer is separated, and the aqueous one is extracted twice with CH2Cl2. The combined organic extracts are dried over Na2SO4, filtered and concentrated. The crude product is purified by flash chromatography on silica gel (eluent: c-hexane/AcOEt 20:80 to 0:100) to give the title compound. TLC, Rf (CH2Cl2/MeOH 95:5)=0.4. MS (LC-MS): 526 [M-Boc+H]+; tR (HPLC, Macherey-Nagel Nucleosil C18 column, 10-100% CH3CN/H2O/5 min, 100% CH3CN/3 min, CH3CN and H2O containing 0.1% TFA, flow: 1.5 ml/min): 5.71 min.

Workup

  1. customto reach RT
  2. stirringfurther stirred for 1 h
  3. customThe organic layer is separated
  4. extractionthe aqueous one is extracted twice with CH2Cl2
  5. dry with materialThe combined organic extracts are dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude product is purified by flash chromatography on silica gel (eluent: c-hexane/AcOEt 20:80 to 0:100)

Sources & evidence

ORD record
ord-2818dff2e9f04c91bf8140ae55cd1190
Source dataset
uspto-grants-2010_10
Patent number
US07807709B2

Reaction notes

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