Phosphate → 6-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1-hydroxy-3-t-butyldimethylsilyloxypropyl)-1-pyridinyl}-2H-benzo[b]pyran

HRID 487648Notes

Reaction equation

HRID 487648 reaction equation
[C:1]([C:3]1[CH:26]=[CH:25][C:6]2[O:7][C:8]([CH3:24])([CH3:23])[CH:9]=[C:10]([N:11]3[CH:16]=[CH:15][C:14]([CH:17]([OH:21])[CH2:18][CH2:19][OH:20])=[CH:13][C:12]3=[O:22])[C:5]=2[CH:4]=1)#[N:2].C(N(CC)CC)C.[Si:34](Cl)([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:36])[CH3:35].P([O-])([O-])([O-])=O>C(Cl)Cl>[C:1]([C:3]1[CH:26]=[CH:25][C:6]2[O:7][C:8]([CH3:23])([CH3:24])[CH:9]=[C:10]([N:11]3[CH:16]=[CH:15][C:14]([CH:17]([OH:21])[CH2:18][CH2:19][O:20][Si:34]([C:37]([CH3:40])([CH3:39])[CH3:38])([CH3:36])[CH3:35])=[CH:13][C:12]3=[O:22])[C:5]=2[CH:4]=1)#[N:2]

Participants

6

Reactant 4

HCID 1061PhosphateHCID 8471TriethylamineHCID 28928tert-Butyldimethylsilyl chlorideHCID 190925486-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1,3-dihydroxypropyl)-1-pyridinyl}-2H-benzo[b]pyran

Product 1

HCID 217469036-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1-hydroxy-3-t-butyldimethylsilyloxypropyl)-1-pyridinyl}-2H-benzo[b]pyranYield 104%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

In 15 ml of anhydrous methylene chloride, is dissolved 1.06 g of 6-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1,3-dihydroxypropyl)-1-pyridinyl}-2H-benzo[b]pyran obtained in Example 37. Thereto are added 0.46 ml of triethylamine and 6 ml of a solution containing 0.48 g t-butyldimethylsilyl chloride in anhydrous methylene chloride at 0° C., and the resulting mixture is reacted at room temperature for 8 hours. After stopping the reaction by adding 0.2M phosphate buffer, the reaction mixture is extracted with methylene chloride. The organic layer is washed with saturated aqueous solution of sodium chloride and dried over anhydrous sodium sulfate. The inorganic matter is filtered off and the filtrate is concentrated under reduced pressure. Thus, 1.46 g of 6-cyano-2,2-dimethyl-4-{1,2-dihydro-2-oxo-4-(1-hydroxy-3-t-butyldimethylsilyloxypropyl)-1-pyridinyl}-2H-benzo[b]pyran is obtained.

Workup

  1. customthe resulting mixture is reacted at room temperature for 8 hours
  2. customthe reaction
  3. extractionthe reaction mixture is extracted with methylene chloride
  4. washThe organic layer is washed with saturated aqueous solution of sodium chloride
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationThe inorganic matter is filtered off
  7. concentrationthe filtrate is concentrated under reduced pressure

Sources & evidence

ORD record
ord-c173722bf2c847be835dff8ca6a8fbe3
Source dataset
uspto-grants-1994_03
Patent number
US05296492

Reaction notes

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