Pyridine → HCID 86701053, compound

HRID 1430677Notes

Reaction equation

HRID 1430677 reaction equation
[CH2:1]([O:8][N:9]1[C:15](=[O:16])[N:14]2[CH2:17][C@H:10]1[CH2:11][CH2:12][C@H:13]2[C:18]([NH:20][NH:21][C:22]([N:24]1[CH2:29][CH2:28][N:27]([C:30]([O:32][C:33]([CH3:36])([CH3:35])[CH3:34])=[O:31])[CH2:26][CH2:25]1)=[O:23])=O)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.N1C=CC=CC=1.O(S(C(F)(F)F)(=O)=O)S(C(F)(F)F)(=O)=O.C([O-])(O)=O.[Na+]>C(Cl)Cl>[CH2:1]([O:8][N:9]1[C:15](=[O:16])[N:14]2[CH2:17][C@H:10]1[CH2:11][CH2:12][C@H:13]2[C:18]1[O:23][C:22]([N:24]2[CH2:29][CH2:28][N:27]([C:30]([O:32][C:33]([CH3:35])([CH3:36])[CH3:34])=[O:31])[CH2:26][CH2:25]2)=[N:21][N:20]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 1049PyridineHCID 67749Trifluoromethanesulfonic anhydrideHCID 516892Sodium BicarbonateHCID 86701006HCID 86701006, compound

Product 1

HCID 86701053HCID 86701053, compoundYield 83%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of tert-butyl 4-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carbonyl)hydrazine-carbonyl)piperazine-1-carboxylate (903 mg, 1.8 mmol) in DCM (200 mL) was added pyridine (2.8 mL, 36.0 mmol). (CF3SO2)2O (2.8 ml, 9.0 mmol) was then slowly added at −10° C. The reaction mixture was stirred at rt for 3 hrs. Sat. NaHCO3 was added at −10° C. very slowly. The organic layer was separated and the aqueous layer was exacted with EtOAc (3×). The combined organic layer was dried over Na2SO4 and concentrated. The crude product was purified by silica gel column chromatography (2:1 EtOAc/hexanes) to give tert-butyl 4-(5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)piperazine-1-carboxylate (723 mg, 83%) as a slight yellow solid. ESI-MS (EI+, m/z): 485.2 [M+H]+.

Workup

  1. customThe organic layer was separated
  2. dry with materialThe combined organic layer was dried over Na2SO4
  3. concentrationconcentrated
  4. customThe crude product was purified by silica gel column chromatography (2:1 EtOAc/hexanes)

Sources & evidence

ORD record
ord-fd7e869443564f8e98efc4a6740732d5
Source dataset
uspto-grants-2015_01
Patent number
US08940897B2

Reaction notes

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