Water → 4(R)-Benzyloxy-6(S)-[2-(2,4-dichlorophenyl)ethyl]-2(R)-methoxy-3,4,5,6-tetrahydro-2H-pyran

HRID 325542Notes

Reaction equation

HRID 325542 reaction equation
C1(S([CH:10]([C:28]2[CH:33]=[CH:32][C:31]([Cl:34])=[CH:30][C:29]=2[Cl:35])[CH2:11][C@H:12]2[O:17][C@@H:16]([O:18][CH3:19])[CH2:15][C@H:14]([O:20][CH2:21][C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[CH2:13]2)(=O)=O)C=CC=CC=1.P(O)([O-])([O-])=O.[Na+].[Na+].O>CO.[Na].[Hg]>[CH2:21]([O:20][C@@H:14]1[CH2:13][C@H:12]([CH2:11][CH2:10][C:28]2[CH:33]=[CH:32][C:31]([Cl:34])=[CH:30][C:29]=2[Cl:35])[O:17][C@@H:16]([O:18][CH3:19])[CH2:15]1)[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1

Participants

6

Reactant 3

HCID 962WaterHCID 24203Sodium Phosphate, DibasicHCID 228261981-(2,4-dichlorophenyl)-2-(4(R)-benzyloxy-2(R)-methoxy-3,4,5,6-tetrahydro-2H-pyran-6(S)-yl)ethyl phenyl sulfone

Product 1

HCID 228261994(R)-Benzyloxy-6(S)-[2-(2,4-dichlorophenyl)ethyl]-2(R)-methoxy-3,4,5,6-tetrahydro-2H-pyranYield 92%

Reagents, catalysts & solvents 2

HCID 9837419Sodium amalgamCatalyst2×HCID 887MethanolSolvent

Procedure

To a mixture of 1-(2,4-dichlorophenyl)-2-(4(R)-benzyloxy-2(R)-methoxy-3,4,5,6-tetrahydro-2H-pyran-6(S)-yl)ethyl phenyl sulfone (0.06 g, 0.11 mmole) and anhydrous disodium phosphate (0.065 g, 0.45 mmoles) in dry methanol (5 ml) was added pulverized 5% sodium amalgam (0.2 g). The mixture was stirred at room temperature for twenty hours, during which time an additional 0.4 g of 5% sodium amalgam was added in three portions. The reaction mixture was poured into water and extracted with ether. The ether solution was dried (MgSO4), filtered, and the solvent evaporated in vacuo to give the title compound as a colorless viscous oil (0.04 g); 'H NMR (CDCl3) δ 1.53 (1H, ddd), 1.58-1.88 (4H, m), 2.06 (1H, m), 2.70 (1H, ddd), 2.95 (1H, ddd), 3.42 (3H, s), 3.76 (1H, p), 4.16 (1H, d), 4.52 (1H, d), 4.65 (1H, d), 4.78 (1H, dd), 7.13-7.40 (8H, m).

Workup

  1. additionwas added
  2. additionwas added in three portions
  3. extractionextracted with ether
  4. dry with materialThe ether solution was dried (MgSO4)
  5. filtrationfiltered
  6. customthe solvent evaporated in vacuo

Sources & evidence

ORD record
ord-1907b127c72c41479c8544c82f587d97
Source dataset
uspto-grants-1984_04
Patent number
US04440927

Reaction notes

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