Allyl bromide → (1R,3S,5R)-2-aza-bicyclo[3.1.0]hexane-2,3-dicarboxylic acid 3-allyl ester 2-tert-butyl ester

HRID 1052121Notes

Reaction equation

HRID 1052121 reaction equation
[C:1]([O:5][C:6]([N:8]1[C@H:13]([C:14]([OH:16])=[O:15])[CH2:12][C@@H:11]2[C@H:9]1[CH2:10]2)=[O:7])([CH3:4])([CH3:3])[CH3:2].C([O-])([O-])=O.[Cs+].[Cs+].[CH2:23](Br)[CH:24]=[CH2:25]>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[C@H:13]([C:14]([O:16][CH2:25][CH:24]=[CH2:23])=[O:15])[CH2:12][C@@H:11]2[C@H:9]1[CH2:10]2)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 7841Allyl bromideHCID 10796Cesium carbonateHCID 11020613(1R,3S,5R)-2-(tert-Butoxycarbonyl)-2-azabicyclo[3.1.0]hexane-3-carboxylic acid

Product 1

HCID 68282982(1R,3S,5R)-2-aza-bicyclo[3.1.0]hexane-2,3-dicarboxylic acid 3-allyl ester 2-tert-butyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (1R,3S,5R)-2-azabicyclo[3.1.0]hexane-2,3-dicarboxylic acid 2-tert-butyl ester (1.5 g, 3.6 mmol) and Cs2CO3 (2.26 g, 6.9 mmol) in DMF (20 mL), allyl bromide (0.6 mL, 3.9 mmol) was added under nitrogen atmosphere. The reaction mixture was stirred for 40 h at RT. DMF was evaporated. The residue was dissolved in EtOAc and washed with aq. HCl 1 N, dried over Na2SO4, filtered and concentrated. The crude residue was purified by flash column chromatography on silica gel (c-hexane to c-hexane/EtOAc 4:6) to give the title compound. MS (LCMS): 167.9 [MH-Boc]+, 290.0 [M+Na]+.

Workup

  1. customDMF was evaporated
  2. dissolutionThe residue was dissolved in EtOAc
  3. washwashed with aq. HCl 1 N
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude residue was purified by flash column chromatography on silica gel (c-hexane to c-hexane/EtOAc 4:6)

Sources & evidence

ORD record
ord-3a6d534607a04ca8b71bf322c86d4aac
Source dataset
uspto-grants-2016_07
Patent number
US09388199B2

Reaction notes

Loading…