Acetic Acid → HCID 22242864, compound

HRID 891752Notes

Reaction equation

HRID 891752 reaction equation
[Si]([O:18][CH:19]1[CH2:22][N:21]([C:23]2[S:24][CH:25]=[C:26]([C:28](=[O:47])[N:29]([CH3:46])[CH2:30][CH2:31][NH:32][C:33]([O:35][CH2:36][C:37]3[CH:42]=[CH:41][C:40]([N+:43]([O-:45])=[O:44])=[CH:39][CH:38]=3)=[O:34])[N:27]=2)[CH2:20]1)(C(C)(C)C)(C1C=CC=CC=1)C1C=CC=CC=1.C(O)(=O)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>O1CCCC1>[OH:18][CH:19]1[CH2:22][N:21]([C:23]2[S:24][CH:25]=[C:26]([C:28](=[O:47])[N:29]([CH3:46])[CH2:30][CH2:31][NH:32][C:33]([O:35][CH2:36][C:37]3[CH:42]=[CH:41][C:40]([N+:43]([O-:45])=[O:44])=[CH:39][CH:38]=3)=[O:34])[N:27]=2)[CH2:20]1

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 2724141Tetrabutylammonium FluorideHCID 22242968HCID 22242968, compound

Product 1

HCID 22242864HCID 22242864, compoundYield 84%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 3-t-butyldiphenylsilyloxy-1-(4-{N-methyl-N-[2-(p-nitrobenzyloxycarbonylamino)-ethyl]carbamoyl}-1,3-thiazol-2-yl)azetidine (806.9 mg, 1.20 mmol) (obtained as described in Reference Example 58(3)) in anhydrous tetrahydrofuran (40 ml) were added successively acetic acid (0.09 ml, 1.57 mmol) and a solution of 1.0M tetra-n-butylammonium fluoride in tetrahydrofuran (1.44 ml, 1.44 mmol) in an ice bath, and then the mixture was stirred in the ice bath for 4 hours. After checking the completion of the reaction, the reaction mixture was partitioned between ethyl acetate and saturated aqueous sodium hydrogencarbonate solution. The obtained organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using ethyl acetate: methanol (15:1) as the eluant to afford 3-hydroxy-1-(4-{N-methyl-N-[2-(p-nitrobenzyloxycarbonylamino)-ethyl]carbamoyl}-1,3-thiazol-2-yl)azetidine (428.2 mg, yield 84%) as a white solid.

Workup

  1. customthe completion of the reaction
  2. customthe reaction mixture was partitioned between ethyl acetate and saturated aqueous sodium hydrogencarbonate solution
  3. washThe obtained organic layer was washed with saturated aqueous sodium chloride solution
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by chromatography on a silica gel column

Sources & evidence

ORD record
ord-aa5ebdff317947bd821dd0e0dee8ac36
Source dataset
uspto-grants-2006_02
Patent number
US07001897B2

Reaction notes

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