1,2-Dichloroethane → tert-Butyl [(3R,6S)-6-(2,3-difluorophenyl)-2-oxoazepan-3-yl]carbamate

HRID 881684Notes

Reaction equation

HRID 881684 reaction equation
[C:1]([O:5][C:6]([N:8](C(OC(C)(C)C)=O)[C@@H:9]([C:23]([OH:25])=O)[CH2:10][CH2:11][C@@H:12]([C:15]1[CH:20]=[CH:19][CH:18]=[C:17]([F:21])[C:16]=1[F:22])[CH2:13][NH2:14])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(Cl)CCl.C1C=NC2N(O)N=NC=2C=1.C(N(CC)CC)C.C([O-])(O)=O.[Na+]>C(Cl)Cl>[F:22][C:16]1[C:17]([F:21])=[CH:18][CH:19]=[CH:20][C:15]=1[C@H:12]1[CH2:13][NH:14][C:23](=[O:25])[C@H:9]([NH:8][C:6](=[O:7])[O:5][C:1]([CH3:4])([CH3:3])[CH3:2])[CH2:10][CH2:11]1

Participants

7

Reactant 5

HCID 111,2-DichloroethaneHCID 8471TriethylamineHCID 181649HOAtHCID 516892Sodium BicarbonateHCID 67526479(5S)-N2,N2-Bis(tert-butoxycarbonyl)-5-(2,3-difluorophenyl)-D-lysine

Product 1

HCID 23657400tert-Butyl [(3R,6S)-6-(2,3-difluorophenyl)-2-oxoazepan-3-yl]carbamate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution (5S)—N2,N2-bis(tert-butoxycarbonyl)-5-(2,3-difluorophenyl)-D-lysine from Step D (22.0 g, 48.0 mmol) in CH2Cl2 (700 mL) were added EDC (11.0 g, 57.6 mmol) and HOAT (3.27 g, 24.0 mmol) followed by triethylamine (10.0 mL, 72.0 mmol). After 1 h, aqueous NaHCO3 was added, the layers were separated, and the aqueous phase was extracted with CH2Cl2. The combined organic extracts were dried over MgSO4, filtered and concentrated in vacuo. The residue was purified by silica gel chromatography, eluting with CH2Cl2:MeOH—90:10, to give the title compound. MS: m/z=341 (M+1).

Workup

  1. customthe layers were separated
  2. extractionthe aqueous phase was extracted with CH2Cl2
  3. dry with materialThe combined organic extracts were dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by silica gel chromatography
  7. washeluting with CH2Cl2

Sources & evidence

ORD record
ord-cd87da0be2e345be98657bd68e44f74e
Source dataset
uspto-grants-2015_03
Patent number
US08993588B2

Reaction notes

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