Phenylacetyl chloride → {1-Cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-4-phenylacetyl-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl ester

HRID 1949638Notes

Reaction equation

HRID 1949638 reaction equation
C[O:2][C:3]([N:5]1[CH2:9][CH:8]([C:10]2[C:18]3[C:13](=[CH:14][C:15]([F:19])=[CH:16][CH:17]=3)[NH:12][CH:11]=2)[CH:7]2[N:20]([C:23](=[O:39])[CH:24]([NH:31][C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH:25]3[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]3)[CH2:21][CH2:22][CH:6]12)=O.[C:40]1([CH2:46]C(Cl)=O)[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=1>C(Cl)Cl>[C:35]([O:34][C:32](=[O:33])[NH:31][CH:24]([CH:25]1[CH2:30][CH2:29][CH2:28][CH2:27][CH2:26]1)[C:23]([N:20]1[CH2:21][CH2:22][CH:6]2[N:5]([C:3](=[O:2])[CH2:46][C:40]3[CH:45]=[CH:44][CH:43]=[CH:42][CH:41]=3)[CH2:9][CH:8]([C:10]3[C:18]4[C:13](=[CH:14][C:15]([F:19])=[CH:16][CH:17]=4)[NH:12][CH:11]=3)[CH:7]12)=[O:39])([CH3:38])([CH3:37])[CH3:36]

Participants

4

Reactant 2

HCID 7679Phenylacetyl chlorideHCID 674097574-(2-tert-Butoxycarbonylamino-2-cyclohexyl-acetyl)-3-(6-fluoro-1H-indol-3-yl)-hexahydro-pyrrolo[3,2-b]pyrrole-1-carboxylic acid methyl ester

Product 1

HCID 67408591{1-Cyclohexyl-2-[6-(6-fluoro-1H-indol-3-yl)-4-phenylacetyl-hexahydro-pyrrolo[3,2-b]pyrrol-1-yl]-2-oxo-ethyl}-carbamic acid tert-butyl esterYield 66.4%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
0 °C

Procedure

A solution containing amine 50 (296 mg, 0.61 mmol) in DCM (8 mL) was cooled to 0° C. TEA (145 mg, 1.43 mmol) was added followed by phenylacetyl chloride (105 mg, 0.68 mmol) and the reaction mixture was warmed to ambient temperature. After 40 min, the reaction mixture was diluted with DCM and the resulting organic solution was washed successively with 1M HCl and brine, dried over anhydrous Na2SO4, filtered, and concentrated. The crude product was purified by flash silica gel chromatography (1:1 hexanes/EtOAc to 1:2 hexanes/EtOAc) to afford 244 mg (66%) of 56 as an off-white-colored foam. 1H NMR (300 MHz, CDCl3), mixture of amide rotamers: δ8.27 (s, 0.7H), 8.20 (s, 0.3H), 8.02 (dd, J=5.1, 8.4 Hz, 0.7H), 7.35-7.27 (m, 5H), 6.96-6.89 (m, 2H), 6.53 (s, 0.3H), 6.14 (s, 0.7H), 5.34 (d, J=9.3 Hz, 0.7H), 4.77 (d, J=5.1 Hz, 0.3H), 4.51-4.38 (m, 2H), 4.34-4.28 (m, 1H), 4.12 (app q, J=6.9 Hz, 1H), 4.04-3.89 (m, 2H), 3.77 (s, 1H), 3.51-3.42 (m, 0.7H), 3.30-3.20 (m, 0.3H), 2.60-2.53 (m, 1H), 1.76-1.63 (m, 6H), 1.44 (s, 9H), 1.19-1.05 (m, 5H) ppm. Mass spectrum, m/z [603.4] (M+H)+.

Workup

  1. temperaturethe reaction mixture was warmed to ambient temperature
  2. washthe resulting organic solution was washed successively with 1M HCl and brine
  3. dry with materialdried over anhydrous Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude product was purified by flash silica gel chromatography (1:1 hexanes/EtOAc to 1:2 hexanes/EtOAc)

Sources & evidence

ORD record
ord-e1fff0a1f60b494c8fd617083cbe3fce
Source dataset
uspto-grants-2013_03
Patent number
US08399683B2

Reaction notes

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