Potassium Carbonate → benzyl 4-(4-hydroxyphenyl)-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

HRID 1176494Notes

Reaction equation

HRID 1176494 reaction equation
C([O:4][C:5]1[CH:10]=[CH:9][C:8]([CH:11]2[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)=[O:18])[CH2:13][CH:12]2[O:27][CH2:28][C:29]2[CH:30]=[CH:31][C:32]3[O:37][CH2:36][C:35](=[O:38])[N:34]([CH2:39][CH2:40][CH2:41][O:42][CH3:43])[C:33]=3[CH:44]=2)=[CH:7][CH:6]=1)C=C.C(=O)([O-])[O-].[K+].[K+]>CO.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[OH:4][C:5]1[CH:10]=[CH:9][C:8]([CH:11]2[CH2:16][CH2:15][N:14]([C:17]([O:19][CH2:20][C:21]3[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=3)=[O:18])[CH2:13][CH:12]2[O:27][CH2:28][C:29]2[CH:30]=[CH:31][C:32]3[O:37][CH2:36][C:35](=[O:38])[N:34]([CH2:39][CH2:40][CH2:41][O:42][CH3:43])[C:33]=3[CH:44]=2)=[CH:7][CH:6]=1

Participants

5

Reactant 2

HCID 11430Potassium CarbonateHCID 68505876benzyl 4-(4-allyloxyphenyl)-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

Product 1

HCID 68500605benzyl 4-(4-hydroxyphenyl)-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 887MethanolSolvent

Procedure

The solution of 10.0 g of benzyl 4-(4-allyloxyphenyl)-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate in 160 ml of methanol is admixed successively with 0.57 g of tetrakis(triphenylphosphine)palladium(0) and potassium carbonate. The reaction mixture is stirred at room temperature over 2 hours and subsequently concentrated by evaporation. The residue is admixed slowly with 2M HCl (70 ml) and extracted with dichloromethane (2×250 ml). The organic phases are washed with water (150 ml) and brine (150 ml), dried over sodium sulphate, filtered and concentrated by evaporation. The title compound is obtained as a colourless oil from the residue by means of flash chromatography (SiO2 60F). Rf=0.20 (3:2 EtOAc-heptane); Rt=4.54.

Workup

  1. concentrationsubsequently concentrated by evaporation
  2. extractionextracted with dichloromethane (2×250 ml)
  3. washThe organic phases are washed with water (150 ml) and brine (150 ml)
  4. dry with materialdried over sodium sulphate
  5. filtrationfiltered
  6. concentrationconcentrated by evaporation

Sources & evidence

ORD record
ord-83c7de855b70412cbeb80f765a7848c7
Source dataset
uspto-grants-2010_11
Patent number
US07842688B2

Reaction notes

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