1-Iodonaphthalene → Methyl 4-(1-naphthyl)-2-oxobutyrate

HRID 278471

Reaction equation

HRID 278471 reaction equation
P(CCCC)(CCCC)CCCC.CCN(CC)CC.[OH:21][CH:22]([CH:27]=[CH2:28])[C:23]([O:25][CH3:26])=[O:24].I[C:30]1[C:39]2[C:34](=[CH:35][CH:36]=[CH:37][CH:38]=2)[CH:33]=[CH:32][CH:31]=1>CN(C=O)C.CC([O-])=O.CC([O-])=O.[Pd+2].O>[C:38]1([CH2:28][CH2:27][C:22](=[O:21])[C:23]([O:25][CH3:26])=[O:24])[C:39]2[C:34](=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:35]=[CH:36][CH:37]=1

Participants

8

Reactant 4

HCID 70041-IodonaphthaleneHCID 8471TriethylamineHCID 13831TributylphosphineHCID 545123Methyl 2-hydroxybut-3-enoate

Product 1

HCID 18370780Methyl 4-(1-naphthyl)-2-oxobutyrateYield 6.9%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

To a stirred solution of Pd(OAc)2 (340 mg), nBu3P (613 mg), and Et3N (1.99 g) in DMF (30 ml) was added methyl 2-hydroxy-3-butenoate (1.76 g) followed by 1-iodonaphthalene (5.0 g), and the reaction mixture was stirred at 100° C. for 2.5 hours. The reaction mixture was poured into water (300 ml) and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate, and evaporated in vacuo. The residue was purified by silica gel (130 g) column chromatography eluting with hexane/ethyl acetate (50:1) to give methyl 4-(1-naphthyl)-2-oxobutyrate (254 mg) as a red oil.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over magnesium sulfate
  4. customevaporated in vacuo
  5. customThe residue was purified by silica gel (130 g) column chromatography
  6. washeluting with hexane/ethyl acetate (50:1)

Sources & evidence

ORD record
ord-9e3c425c714a4a85a45538e47de2e0fe
Source dataset
uspto-grants-2002_03
Patent number
US06359145B1

Linked notes

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