Methyl acetoacetate → 6-Cyclohexyl-4-hydroxy-6-[2-(4-hydroxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one

HRID 1003838Notes

Reaction equation

HRID 1003838 reaction equation
[C:1](OC)(=[O:6])[CH2:2][C:3]([CH3:5])=[O:4].[H-].[Na+].C([Li])CCC.C([O:23][C:24]1[CH:29]=[CH:28][C:27]([CH2:30][CH2:31][C:32]([CH:34]2[CH2:39][CH2:38][CH2:37][CH2:36][CH2:35]2)=[O:33])=[CH:26][CH:25]=1)C1C=CC=CC=1>CCCCCC.C1COCC1>[CH:34]1([C:32]2([CH2:31][CH2:30][C:27]3[CH:26]=[CH:25][C:24]([OH:23])=[CH:29][CH:28]=3)[O:33][C:1](=[O:6])[CH:2]=[C:3]([OH:4])[CH2:5]2)[CH2:35][CH2:36][CH2:37][CH2:38][CH2:39]1

Participants

7

Reactant 4

HCID 7757Methyl acetoacetateHCID 24758Sodium hydrideHCID 187986683-(4-Benzyloxy-phenyl)-1-cyclohexyl-propan-1-oneHCID 178418339Butyllithium

Product 1

HCID 547203146-Cyclohexyl-4-hydroxy-6-[2-(4-hydroxy-phenyl)-ethyl]-5,6-dihydro-pyran-2-one

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8058HexaneSolvent

Conditions

Temperature
0 °C

Procedure

The title compound was prepared as described in General Method 6 using 11.6 g (99.9 mmol) of methyl acetoacetate, 4.19 g (105 mmol) of NaH (60% dispersion in oil), 64.0 mL (102 mmol) of 1.6 M n-butyl lithium in hexane, 16.1 g (49.9 mmol) of 3-(4-benzyloxy-phenyl)-1-cyclohexyl-propan-1-one (prepared in Example G) and 550 mL of THF. After addition of the ketone, the reaction was stirred for 120 minutes at 0° C., then 1 hour at room temperature. The reaction was quenched with acetic acid (12 mL) and worked up in the usual manner. The crude product was carried on without further purification.

Workup

  1. custom1 hour
  2. customat room temperature
  3. customThe reaction was quenched with acetic acid (12 mL)
  4. customThe crude product was carried on without further purification

Sources & evidence

ORD record
ord-9ec630cb833643e8b91a287fbe689295
Source dataset
uspto-grants-2000_04
Patent number
US06046355

Reaction notes

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