Pyridine → HCID 86701013, compound

HRID 1430681Notes

Reaction equation

HRID 1430681 reaction equation
O(S(C(F)(F)F)(=O)=O)S(C(F)(F)F)(=O)=O.[CH2:16]([O:23][N:24]1[C:30](=[O:31])[N:29]2[CH2:32][C@H:25]1[CH2:26][CH2:27][C@H:28]2[C:33]([NH:35][NH:36][C:37](=[O:41])[C:38]([NH2:40])=[O:39])=O)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.N1C=CC=CC=1>C(Cl)Cl>[CH2:16]([O:23][N:24]1[C:30](=[O:31])[N:29]2[CH2:32][C@H:25]1[CH2:26][CH2:27][C@H:28]2[C:33]1[O:41][C:37]([C:38]([NH2:40])=[O:39])=[N:36][N:35]=1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 67749Trifluoromethanesulfonic anhydrideHCID 86701011HCID 86701011, compound

Product 1

HCID 86701013HCID 86701013, compoundYield 63.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(CF3SO2)2O (0.58 g, 2.08 mmol) was slowly added to a −10° C. solution of 2-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-2-oxoacetamide (0.30 g, 0.83 mmol) and pyridine (0.6 mL) in dry DCM (5 mL). The reaction mixture was allowed to warm to rt. The reaction mixture was stirred at rt for 1 h then quenched with sat. NaHCO3 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 residue was purified by silica gel column chromatography (gradient elution 1:10 to 2:1 EtOAc/hexane followed by 10:1 to 2:1 petroleum ether/EtOAC) to give 5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diazabicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazole-2-carboxamide (0.18 g, 47%) as a slight yellow solid. ESI-MS (EI+, m/z): 344.0 [M+H]+.

Workup

  1. customthen quenched with sat. NaHCO3 very slowly
  2. customThe organic layer was separated
  3. dry with materialThe combined organic layer was dried over Na2SO4
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel column chromatography (gradient elution 1:10 to 2:1 EtOAc/hexane followed by 10:1 to 2:1 petroleum ether/EtOAC)

Sources & evidence

ORD record
ord-94f6e00a4c5d474f978415053c58cae5
Source dataset
uspto-grants-2015_01
Patent number
US08940897B2

Reaction notes

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