Tetrabutylammonium Fluoride → 4-[(1S,7S,7aR)-7-Hydroxy-1-methyl-3-oxo-hexahydropyrrolo[1,2-c]imidazol-2-yl]-2-chloro-3-methylbenzonitrile

HRID 501621Notes

Reaction equation

HRID 501621 reaction equation
[O:1]([C@@H:9]1[C@@H:16]2[N:12]([C:13](=[O:28])[N:14]([C:18]3[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[C:20]([Cl:26])[C:19]=3[CH3:27])[C@H:15]2[CH3:17])[CH2:11][CH2:10]1)[Si](C(C)(C)C)(C)C.CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C1COCC1>[OH:1][C@@H:9]1[C@@H:16]2[N:12]([C:13](=[O:28])[N:14]([C:18]3[CH:25]=[CH:24][C:21]([C:22]#[N:23])=[C:20]([Cl:26])[C:19]=3[CH3:27])[C@H:15]2[CH3:17])[CH2:11][CH2:10]1

Participants

4

Reactant 2

HCID 2724141Tetrabutylammonium FluorideHCID 167337644-[(1S,7S,7aR)-7-tert-Butyldimethylsilanoxy-1-methyl-3-oxo-hexahydro-pyrrolo[1,2-c]imidazol-2-yl]-2-chloro-3-methylbenzonitrile

Product 1

HCID 167337664-[(1S,7S,7aR)-7-Hydroxy-1-methyl-3-oxo-hexahydropyrrolo[1,2-c]imidazol-2-yl]-2-chloro-3-methylbenzonitrileYield 69.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 61J (369 mg) in THF (4 mL) was added TBAF (1.0 M in THF, 1.3 mL). The reaction was stirred at rt for 1 h. The reaction was extracted with EtOAc which was washed three times with water, dried over MgSO4, filtered and concentrated. Purification by reverse phase HPLC (Phenomenex Luna 20×100 mm S5 C18, 10 min. grad, 20 mL/min, 20-100% B solvent, A=10% MeOH/water+0.1% TFA, B=90% MeOH/Water+0.1% TFA) provided the title compound (186 mg): MS (ES) m/z 306.42 [M+H]+

Workup

  1. extractionThe reaction was extracted with EtOAc which
  2. washwas washed three times with water
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by reverse phase HPLC (Phenomenex Luna 20×100 mm S5 C18, 10 min.

Sources & evidence

ORD record
ord-c94f6dd4da13422f9d31129321f9cab0
Source dataset
uspto-grants-2010_08
Patent number
US07772267B2

Reaction notes

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