Pyridine → HCID 86701053, compound

HRID 515615Notes

Reaction equation

HRID 515615 reaction equation
N1C=CC=CC=1.[CH2:7]([O:14][N:15]1[C:21](=[O:22])[N:20]2[CH2:23][C@H:16]1[CH2:17][CH2:18][C@H:19]2[C:24]([NH:26][NH:27][C:28]([N:30]1[CH2:35][CH2:34][N:33]([C:36]([O:38][C:39]([CH3:42])([CH3:41])[CH3:40])=[O:37])[CH2:32][CH2:31]1)=[O:29])=O)[C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1.O(S(C(F)(F)F)(=O)=O)S(C(F)(F)F)(=O)=O.C([O-])(O)=O.[Na+]>C(Cl)Cl>[CH2:7]([O:14][N:15]1[C:21](=[O:22])[N:20]2[CH2:23][C@H:16]1[CH2:17][CH2:18][C@H:19]2[C:24]1[O:29][C:28]([N:30]2[CH2:35][CH2:34][N:33]([C:36]([O:38][C:39]([CH3:41])([CH3:42])[CH3:40])=[O:37])[CH2:32][CH2:31]2)=[N:27][N:26]=1)[C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=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

Pyridine (2.8 mL, 36.0 mmol was added 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). (CF3SO2)2O (2.8 ml, 9.0 mmol) was then added slowly at −10° C. The reaction mixture was stirred at rt for 3 hrs. Saturated NaHCO3 was added at −10° C. very slowly. The combined 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 combined 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-90c517b0fbd741a1b8aceee047422d34
Source dataset
uspto-grants-2015_08
Patent number
US09108966B2

Reaction notes

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