Tert-butyl 4-[(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethynyl]piperidine-1-carboxylate → Tert-butyl 4-[2-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethyl]piperidine-1-carboxylate

HRID 1749973Notes

Reaction equation

HRID 1749973 reaction equation
[CH3:1][O:2][C:3]1[CH:12]=[CH:11][C:6]2[C:7](=[O:10])[CH2:8][O:9][C:5]=2[C:4]=1[C:13]#[C:14][CH:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]1>C(O)C.[Pd]>[CH3:1][O:2][C:3]1[CH:12]=[CH:11][C:6]2[C:7](=[O:10])[CH2:8][O:9][C:5]=2[C:4]=1[CH2:13][CH2:14][CH:15]1[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][CH2:16]1

Participants

4

Reactant 1

HCID 71278779Tert-butyl 4-[(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethynyl]piperidine-1-carboxylate

Product 1

HCID 71278935Tert-butyl 4-[2-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethyl]piperidine-1-carboxylateYield 81.4%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent

Procedure

A solution of tert-butyl 4-[(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)-ethynyl]piperidine-1-carboxylate (0.0721 g, 0.194 mmol) synthesized in Example B55, Step 1 in ethanol (3 mL) was added with 5% palladium/carbon (wetted with 50% water, 0.0700 g), and the mixture was stirred overnight at room temperature under a hydrogen atmosphere. The reaction mixture was filtered through Celite, and the resulting filtrate was concentrated to obtain tert-butyl 4-[2-(6-methoxy-3-oxo-2,3-dihydrobenzofuran-7-yl)ethyl]piperidine-1-carboxylate (0.0593 g, 81%).

Workup

  1. filtrationThe reaction mixture was filtered through Celite
  2. concentrationthe resulting filtrate was concentrated

Sources & evidence

ORD record
ord-26d36988725e4d1dbbb1285d158ddc22
Source dataset
uspto-grants-2015_10
Patent number
US09156827B2

Reaction notes

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