Potassium Carbonate → 1-[(4,5-Diphenyloxazol-2-yl)methylthio]-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene

HRID 1741425Notes

Reaction equation

HRID 1741425 reaction equation
[SH:1][CH:2]1[C:11]2[C:6](=[C:7]([O:12][CH2:13][C:14]([O:16][CH3:17])=[O:15])[CH:8]=[CH:9][CH:10]=2)[CH2:5][CH2:4][CH2:3]1.[C:18]1([C:24]2[N:25]=[C:26]([CH2:35]Br)[O:27][C:28]=2[C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[C:18]1([C:24]2[N:25]=[C:26]([CH2:35][S:1][CH:2]3[C:11]4[C:6](=[C:7]([O:12][CH2:13][C:14]([O:16][CH3:17])=[O:15])[CH:8]=[CH:9][CH:10]=4)[CH2:5][CH2:4][CH2:3]3)[O:27][C:28]=2[C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=2)[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 5685992-Bromomethyl-4,5-diphenyl-oxazoleHCID 183673561-Mercapto-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene

Product 1

HCID 183674061-[(4,5-Diphenyloxazol-2-yl)methylthio]-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthaleneYield 58.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of 1-hydroxy-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene (0.42 g) and Lawesson's reagent (0.40 g) in toluene (4 ml) was refluxed under N2 atmosphere for 1 hour. The reaction mixture was purified by chromatography on silica gel to give 1-mercapto-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene (0.20 g). A solution of 1-mercapto-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene (0.26 g), (4,5-diphenyloxazol-2-yl)methyl bromide (0.32 g) and potassium carbonate (0.14 g) in DMF (5 ml) was stirred for 6 hours at room temperature. The mixture was partitioned between ethyl acetate and water. The organic layer was washed with brine. The dried solvent was evaporated in vacuo. The residue was purified by chromatography on silica gel to give 1-[(4,5-diphenyloxazol-2-yl)methylthio]-1,2,3,4-tetrahydro-5-methoxycarbonylmethoxynaphthalene (0.29 g). MS (m/z): 486 (M+ +1) NMR (CDCl3, δ): 1.75-1.92 (1H, m), 2.00-2.22 (3H, m), 2.45-2.72 (1H, m), 2.80-3.02 (1H, m), 3.79 (3H, s), 3.91 (1H, s), 3.94 (1H, s), 4.36 (1H, m), 4.60 (2H, s), 6.50-6.55 (1H, m), 7.04-7.06 (2H, m), 7.33-7.40 (6H, m), 7.59-7.68 (4H, m)

Workup

  1. customThe mixture was partitioned between ethyl acetate and water
  2. washThe organic layer was washed with brine
  3. customThe dried solvent was evaporated in vacuo
  4. customThe residue was purified by chromatography on silica gel

Sources & evidence

ORD record
ord-480c2febef7a45b68a06362e27a47f36
Source dataset
uspto-grants-1999_10
Patent number
US05972965

Reaction notes

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