Sodium Carbonate → Methyl 2-{4-[1-(tert-butoxycarbonyl)-1,2,3,6-tetrahydropyridin-4-yl]benzyl}-1,2,3,4-tetrahydroisoquinoline-6-carboxylate

HRID 1622306Notes

Reaction equation

HRID 1622306 reaction equation
Br[C:2]1[CH:22]=[CH:21][C:5]([CH2:6][N:7]2[CH2:16][CH2:15][C:14]3[C:9](=[CH:10][CH:11]=[C:12]([C:17]([O:19][CH3:20])=[O:18])[CH:13]=3)[CH2:8]2)=[CH:4][CH:3]=1.CC1(C)C(C)(C)OB([C:31]2[CH2:32][CH2:33][N:34]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[CH2:35][CH:36]=2)O1.C([O-])([O-])=O.[Na+].[Na+]>COCCOC.O.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>[C:40]([O:39][C:37]([N:34]1[CH2:33][CH:32]=[C:31]([C:2]2[CH:22]=[CH:21][C:5]([CH2:6][N:7]3[CH2:16][CH2:15][C:14]4[C:9](=[CH:10][CH:11]=[C:12]([C:17]([O:19][CH3:20])=[O:18])[CH:13]=4)[CH2:8]3)=[CH:4][CH:3]=2)[CH2:36][CH2:35]1)=[O:38])([CH3:43])([CH3:41])[CH3:42]

Participants

7

Reactant 3

HCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 67980521HCID 67980521, compound

Product 1

HCID 67980088Methyl 2-{4-[1-(tert-butoxycarbonyl)-1,2,3,6-tetrahydropyridin-4-yl]benzyl}-1,2,3,4-tetrahydroisoquinoline-6-carboxylateYield 89%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
80 °C

Procedure

A solution of methyl 2-(4-bromobenzyl)-1,2,3,4-tetrahydroisoquinoline-6-carboxylate (200.0 mg, 0.600 mmol) and tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridine-1(2H)-carboxylate (188.8 mg, 0.6107 mmol) in DME (5.15 mL) was treated with Na2CO3 (2.00 M in water, 0.83 mL, 1.66 mmol). The mixture was degassed and Pd(Ph3P)4 (13 mg, 0.011 mmol) was added. The reaction mixture was heated under argon at 80° C. overnight. The mixture was then cooled to room temperature and diluted with water. The aqueous phase was extracted twice with EtOAc. The combined organic phases were washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified by column chromatography (SiO2, 10-50% EtOAc in hexanes) to give methyl 2-{4-[1-(tert-butoxycarbonyl)-1,2,3,6-tetrahydropyridin-4-yl]benzyl}-1,2,3,4-tetrahydroisoquinoline-6-carboxylate (228 mg, 89%). LC-MS: (FA) ES+ 263.

Workup

  1. customThe mixture was degassed
  2. temperatureThe mixture was then cooled to room temperature
  3. extractionThe aqueous phase was extracted twice with EtOAc
  4. washThe combined organic phases were washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by column chromatography (SiO2, 10-50% EtOAc in hexanes)

Sources & evidence

ORD record
ord-f5029909870845f9ab7a80b7ea9c6466
Source dataset
uspto-grants-2014_07
Patent number
US08778931B2

Reaction notes

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