Pyridine → 6-[2-(2-acetoxy-4,6-dichlorophenyl)ethyl]-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one

HRID 986061Notes

Reaction equation

HRID 986061 reaction equation
[C:1](Cl)(=[O:3])[CH3:2].[Cl:5][C:6]1[CH:11]=[C:10]([Cl:12])[CH:9]=[C:8]([OH:13])[C:7]=1[CH2:14][CH2:15][CH:16]1[O:21][C:20](=[O:22])[CH2:19][CH:18]([OH:23])[CH2:17]1.N1C=CC=CC=1>CCOCC>[C:1]([O:13][C:8]1[CH:9]=[C:10]([Cl:12])[CH:11]=[C:6]([Cl:5])[C:7]=1[CH2:14][CH2:15][CH:16]1[O:21][C:20](=[O:22])[CH2:19][CH:18]([OH:23])[CH2:17]1)(=[O:3])[CH3:2]

Participants

5

Reactant 3

HCID 1049PyridineHCID 6367Acetyl chlorideHCID 135531966-{2-(2,4-Dichloro-6-hydroxyphenyl)-ethyl}-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one

Product 1

HCID 201590396-[2-(2-acetoxy-4,6-dichlorophenyl)ethyl]-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Conditions

Temperature
20 °C

Procedure

Acetyl chloride (0.08 ml, 1.05 mmole) was added dropwise to a stirred solution of 6-[2-(2,4-dichloro-6-hydroxyphenyl)ethyl]-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one (300 mg, 1 mmole) and pyridine (0.09 ml, 1.05 mmole) in ether (10 ml) at 0° C. The ice bath was removed and the reaction mixture was stirred at 20° C. for 1 hour and then diluted with H2O (10 ml). The organic layer was separated and washed with 1N HCl (10 ml), H2O (2×10 ml) and brine, dried over MgSO4, filtered and evaporated to provide the title compound.

Workup

  1. customThe ice bath was removed
  2. additiondiluted with H2O (10 ml)
  3. customThe organic layer was separated
  4. washwashed with 1N HCl (10 ml), H2O (2×10 ml) and brine
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. customevaporated

Sources & evidence

ORD record
ord-a148a83b3dde44d786193f7f5a76b54c
Source dataset
uspto-grants-1987_12
Patent number
US04710513

Reaction notes

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