tert-Butyl 3-oxo-2-phenylpiperidine-1-carboxylate → (2S,3R)-1-tert-Butoxycarbonyl-3-hydroxy-3-(2-methylene-3-phenoxypropyl)-2-phenylpiperidine

HRID 1107275Notes

Reaction equation

HRID 1107275 reaction equation
Cl[Mg][CH2:3][C:4]([CH2:6][O:7][C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)=[CH2:5].[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][CH2:24][C:23](=[O:27])[CH:22]1[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:20])([CH3:17])([CH3:16])[CH3:15]>O1CCCC1>[C:14]([O:18][C:19]([N:21]1[CH2:26][CH2:25][CH2:24][C@@:23]([OH:27])([CH2:3][C:4](=[CH2:5])[CH2:6][O:7][C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=2)[C@@H:22]1[C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=1)=[O:20])([CH3:17])([CH3:15])[CH3:16]

Participants

4

Reactant 2

HCID 11414684tert-Butyl 3-oxo-2-phenylpiperidine-1-carboxylateHCID 178458313HCID 178458313, compound

Product 1

HCID 57220489(2S,3R)-1-tert-Butoxycarbonyl-3-hydroxy-3-(2-methylene-3-phenoxypropyl)-2-phenylpiperidine

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A tetrahydrofluran solution of 3-(chloromagnesio)-2-(phenoxymethyl)-1-propene (0.91M, 3 ml) (Louw et. al. Tetrahedron 48:6087-6104, (1992), prepared from 2.74 mmol of 3-chloro-2-(phenoxymethyl)-1-propene) was slowly added to a solution of (±)1-tert-butoxycarbonyl-2-phenylpiperidin-3-one (Desc. 1) in tetrahydrofuran (3 ml). The solution was stirred at room temperature for 1 hour, quenched by addition of saturated ammonium chloride solution (20 ml) and extracted with ethyl acetate (20 ml). The organic phase was washed (saturated brine), dried (MgSO4), evaporated to a small volume and purified by chromatography on a column containing silica gel (eluting with hexane containing increasing proportions of ethyl acetate between 0% to 20%). Evaporation of the fractions gave the title compound. m/z (CI+)424 (M+H), 324 (M+2H--t-BuOCO--), 368 (M+2H--t-Bu).

Workup

  1. customquenched by addition of saturated ammonium chloride solution (20 ml)
  2. extractionextracted with ethyl acetate (20 ml)
  3. washThe organic phase was washed (saturated brine)
  4. dry with materialdried (MgSO4)
  5. customevaporated to a small volume
  6. custompurified by chromatography on a column
  7. additioncontaining silica gel (eluting with hexane containing increasing proportions of ethyl acetate between 0% to 20%)
  8. customEvaporation of the fractions

Sources & evidence

ORD record
ord-31e432fc32e447ab8dc04c3d6c7e32ac
Source dataset
uspto-grants-2000_05
Patent number
US06060469

Reaction notes

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