Trifluoromethanesulfonic anhydride → HCID 86701004, compound

HRID 1430672Notes

Reaction equation

HRID 1430672 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)[CH2:38][CH2:39][CH2:40][NH:41][C:42](=[O:48])[O:43][C:44]([CH3:47])([CH3:46])[CH3:45])=[O:34])[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.C([O-])(O)=O.[Na+]>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:34][C:37]([CH2:38][CH2:39][CH2:40][NH:41][C:42](=[O:48])[O:43][C:44]([CH3:46])([CH3:47])[CH3:45])=[N:36][N:35]=1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

5

Reactant 3

HCID 67749Trifluoromethanesulfonic anhydrideHCID 516892Sodium BicarbonateHCID 86701003HCID 86701003, compound

Product 1

HCID 86701004HCID 86701004, compoundYield 54%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

Tf2O (8.0 mL, 0.0474 mol) was added dropwise to a −78° C. solution of tert-butyl 4-(2-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octane-2-carbonyl)hydrazinyl)-4-oxobutylcarbamate (7.5 g, 0.0158 mol) and Py (10.2 mL, 0.126 mol) in dry DCM (120 mL). The reaction mixture was allowed to warm to 0° C. then the reaction mixture was stirred at 0° C. for 3 hrs. Sat. NaHCO3 was added at 0° C. very slowly. The organic layer was separated and the water layer was exacted with DCM (3×). The combined organic layer was washed with water, saturated sodium chloride, dried over Na2SO4, and concentrated. The residue was purified by silica gel column (gradient elution 0˜25% EtOAc/petroleum ether) to afford tert-butyl 3-(5-((2S,5R)-6-(benzyloxy)-7-oxo-1,6-diaza-bicyclo[3.2.1]octan-2-yl)-1,3,4-oxadiazol-2-yl)propylcarbamate (3.9 g, 54%) as a yellow solid. ESI-MS (EI+, m/z): 458 [M+H]+. 1H NMR (500 MHz, CDCl3) δ 7.45-7.37 (m, 5H), 5.08 (d, J=14.5 Hz, 1H), 4.93 (d, J=14.5 Hz, 1H), 4.70-4.66 (m, 1H), 3.37 (br s, 1H), 3.23-3.21 (m, 2H), 2.94-2.88 (m, 3H), 2.79 (d, J=14.5 Hz, 1H), 2.30-2.28 (m, 2H), 2.11-1.97 (m, 4H), 1.45 (s, 9H).

Workup

  1. customThe organic layer was separated
  2. washThe combined organic layer was washed with water, saturated sodium chloride
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel column (gradient elution 0˜25% EtOAc/petroleum ether)

Sources & evidence

ORD record
ord-2c21d5667ad9439e8e523540a6ce7fd1
Source dataset
uspto-grants-2015_01
Patent number
US08940897B2

Reaction notes

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