Bromomethyl pivalate → Pivaloyloxymethyl (5R,6R)-2-ethylsulfinyl-6-(-2-hydroxy-2-propyl)-pen-2-em-3-carboxylate

HRID 1253160Notes

Reaction equation

HRID 1253160 reaction equation
[C:1]([O:7][CH2:8]Br)(=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3].[CH2:10]([S:12]([C:14]1[S:15][C@@H:16]2[C@H:23]([C:24]([OH:27])([CH3:26])[CH3:25])[C:22](=[O:28])[N:17]2[C:18]=1[C:19]([O-:21])=[O:20])=[O:13])[CH3:11].[Li+]>CN(C=O)C.CCOC(C)=O>[CH2:10]([S:12]([C:14]1[S:15][C@@H:16]2[C@H:23]([C:24]([OH:27])([CH3:25])[CH3:26])[C:22](=[O:28])[N:17]2[C:18]=1[C:19]([O:21][CH2:8][O:7][C:1](=[O:6])[C:2]([CH3:5])([CH3:4])[CH3:3])=[O:20])=[O:13])[CH3:11]

Participants

5

Reactant 2

HCID 15916453Bromomethyl pivalateHCID 131715542lithium (5R,6R)-2-ethylsulfinyl-6-(2-hydroxy-2-propyl)-pen-2-em-3-carboxylate

Product 1

HCID 54331280Pivaloyloxymethyl (5R,6R)-2-ethylsulfinyl-6-(-2-hydroxy-2-propyl)-pen-2-em-3-carboxylate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

Pivaloyloxymethyl bromide (29.3 mg, 0.15 mmol) is added to a suspension of lithium (5R,6R)-2-ethylsulfinyl-6-(2-hydroxy-2-propyl)-pen-2-em-3-carboxylate (29.5 mg, 0.1 mmol) in anhydrous DMF (0.5 ml). The resulting mixture is stirred under a N2 atmosphere at room temperature for 4 hours. The mixture is diluted with EtOAc, washed repeatedly with water, dried with MgSO4, filtered, and evaporated under vacuum to afford a residue of the title compound. This material is purified by preparative TLC.

Workup

  1. washwashed repeatedly with water
  2. dry with materialdried with MgSO4
  3. filtrationfiltered
  4. customevaporated under vacuum

Sources & evidence

ORD record
ord-d514fbc8af494d208413cb1df38d3292
Source dataset
uspto-grants-1988_05
Patent number
US04748162

Reaction notes

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