Triphenylphosphine → 7-[1-(Pyridin-4-yl)piperidin-4-ylmethoxy]-1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid tert-butyl ester

HRID 412513Notes

Reaction equation

HRID 412513 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[C:10](=[CH:11][C:12]([OH:18])=[CH:13][CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].O[CH2:20][CH:21]1[CH2:26][CH2:25][N:24]([C:27]2[CH:32]=[CH:31][N:30]=[CH:29][CH:28]=2)[CH2:23][CH2:22]1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O1CCCC1.C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:17][CH2:16][C:15]2[C:10](=[CH:11][C:12]([O:18][CH2:20][CH:21]3[CH2:22][CH2:23][N:24]([C:27]4[CH:28]=[CH:29][N:30]=[CH:31][CH:32]=4)[CH2:25][CH2:26]3)=[CH:13][CH:14]=2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 10562576Tert-butyl 7-hydroxy-1,2,3,4-tetrahydroisoquinoline-2-carboxylateHCID 11310048(1-(Pyridin-4-YL)piperidin-4-YL)methanol

Product 1

HCID 112816797-[1-(Pyridin-4-yl)piperidin-4-ylmethoxy]-1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid tert-butyl esterYield 75.7%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a mixture of 7-hydroxy-1,2,3,4-tetrahydroisoquinoline-2-carboxylic acid tert-butyl ester (389 mg) and 4-hydroxymethyl-1-(pyridin-4-yl)piperidine (300 mg) in tetrahydrofuran (15 ml) and methylene chloride (5 ml) were added triphenylphosphine (450 mg) and diisopropyl azodicarboxylate (0.34 ml) and the mixture was stirred at room temperature for 24 hours. After completion of the reaction, the reaction mixture was concentrated under reduced pressure and the obtained residue was purified by silica gel column chromatography (hexane:acetone=3:2-1:1, 1% triethylamine) and dried under reduced pressure to give the title compound (500 mg).

Workup

  1. customAfter completion of the reaction
  2. concentrationthe reaction mixture was concentrated under reduced pressure
  3. customthe obtained residue was purified by silica gel column chromatography (hexane:acetone=3:2-1:1, 1% triethylamine)
  4. customdried under reduced pressure

Sources & evidence

ORD record
ord-d8dadf4e44b34495a5d95d7d45b11df0
Source dataset
uspto-grants-2003_05
Patent number
US06562828B1

Reaction notes

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