Triethylamine → HCID 68616943, compound

HRID 1158415Notes

Reaction equation

HRID 1158415 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:12][C@@H:11]([CH2:13][N:14]([C:18](=[O:33])[C:19]2[CH:24]=[CH:23][C:22]([CH2:25][CH3:26])=[C:21]([O:27][CH2:28][CH2:29][CH2:30][O:31][CH3:32])[CH:20]=2)[CH:15]([CH3:17])[CH3:16])[C@H:10]([CH2:34][NH:35][CH:36]2[CH2:38][CH2:37]2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[CH2:39]([O:43][C:44](Cl)=[O:45])[CH:40]([CH3:42])[CH3:41].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]([C:18](=[O:33])[C:19]2[CH:24]=[CH:23][C:22]([CH2:25][CH3:26])=[C:21]([O:27][CH2:28][CH2:29][CH2:30][O:31][CH3:32])[CH:20]=2)[CH:15]([CH3:17])[CH3:16])[C@H:10]([CH2:34][N:35]([CH:36]2[CH2:37][CH2:38]2)[C:44]([O:43][CH2:39][CH:40]([CH3:42])[CH3:41])=[O:45])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 62365Isobutyl chloroformateHCID 516892Sodium BicarbonateHCID 68616608HCID 68616608, compound

Product 1

HCID 68616943HCID 68616943, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of (3R,4R)-3-cyclopropylaminomethyl-4-({[4-ethyl-3-(3-methoxy-propoxy)-benzoyl]-isopropyl-amino}-methyl)-pyrrolidine-1-carboxylic acid tert-butyl ester (250 mg, 0.470 mmol) in CH2Cl2 (3 mL) are added isobutylchloroformate (84 mg, 0.611 mmol) and triethylamine (85 μL, 0.611 mmol) under a N2 atmosphere. The mixture is stirred overnight at RT, diluted with CH2Cl2 and poured into an aqueous saturated solution of NaHCO3. The layers are separated and the aqueous one extracted twice with CH2Cl2. The combined organic extracts are dried over Na2SO4, filtered and concentrated. The crude residue is purified by flash chromatography on silica gel (eluent: CH2Cl2/MeOH 100:0 to 90:10) to give the title compound. MS (LC-MS): 532 [M+H-Boc]+; 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): 8.22 min.

Workup

  1. customThe layers are separated
  2. extractionthe aqueous one extracted twice with CH2Cl2
  3. dry with materialThe combined organic extracts are dried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude residue is purified by flash chromatography on silica gel (eluent: CH2Cl2/MeOH 100:0 to 90:10)

Sources & evidence

ORD record
ord-371db291d62d47e287ead7eda9f8f1e9
Source dataset
uspto-grants-2010_10
Patent number
US07807709B2

Reaction notes

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