Borane → HCID 57655963, compound

HRID 2041342Notes

Reaction equation

HRID 2041342 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][C:12]2[C:15]([S:20][CH2:21][C:22]3[CH:27]=[CH:26][C:25]([C:28](O)=[O:29])=[CH:24][CH:23]=3)=[C:16]([Cl:19])[CH:17]=[CH:18][C:11]=2[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].B>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][C:12]2[C:15]([S:20][CH2:21][C:22]3[CH:23]=[CH:24][C:25]([CH2:28][OH:29])=[CH:26][CH:27]=3)=[C:16]([Cl:19])[CH:17]=[CH:18][C:11]=2[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 6331BoraneHCID 576565513-tert-butoxycarbonyl-6-(4-carboxybenzylthio)-7-chloro-2,3,4,5-tetrahydro-1H-benzo[d]azepine

Product 1

HCID 57655963HCID 57655963, compoundYield 54.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 3-tert-butoxycarbonyl-6-(4-carboxybenzylthio)-7-chloro-2,3,4,5-tetrahydro-1H-benzo[d]azepine (1.85 g, 50% purity, 2.06 mmol) in anhydrous THF (40 mL) under nitrogen, add with stirring 1M borane in THF (4.2 mL) at 0° C. Warm to ambient temperature and stir 2-3 h. Quench by the careful addition of water (3 mL), dilute with saturated aqueous NaHCO3, extract three times with ethyl ether, dry over anhydrous MgSO4, and concentrate in vacuo. Purify by chromatography on silica gel eluting with hexane/EtOAc (5:1) to provide the title compound as a white solid (485 mg, 54%).

Workup

  1. customQuench by the careful addition of water (3 mL)
  2. additiondilute with saturated aqueous NaHCO3
  3. extractionextract three times with ethyl ether
  4. dry with materialdry over anhydrous MgSO4
  5. concentrationconcentrate in vacuo
  6. customPurify by chromatography on silica gel eluting with hexane/EtOAc (5:1)

Sources & evidence

ORD record
ord-10743b8fda774aa39025c1df4db984d1
Source dataset
uspto-grants-2013_11
Patent number
US08580780B2

Reaction notes

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