Cesium carbonate → Methyl 3-[[6-(4-hydroxy-1-piperidyl)-3-methyl-pyridine-2-carbonyl]amino]-2,4-dimethyl-benzoate

HRID 1427112Notes

Reaction equation

HRID 1427112 reaction equation
Cl[C:2]1[N:7]=[C:6]([C:8]([NH:10][C:11]2[C:12]([CH3:22])=[C:13]([CH:18]=[CH:19][C:20]=2[CH3:21])[C:14]([O:16][CH3:17])=[O:15])=[O:9])[C:5]([CH3:23])=[CH:4][CH:3]=1.C([Si](C)(C)[O:29][CH:30]1[CH2:35][CH2:34][NH:33][CH2:32][CH2:31]1)(C)(C)C.C([O-])([O-])=O.[Cs+].[Cs+].C1C=CC(P(C2C(C3C(P(C4C=CC=CC=4)C4C=CC=CC=4)=CC=C4C=3C=CC=C4)=C3C(C=CC=C3)=CC=2)C2C=CC=CC=2)=CC=1>C1(C)C=CC=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd]>[OH:29][CH:30]1[CH2:35][CH2:34][N:33]([C:2]2[N:7]=[C:6]([C:8]([NH:10][C:11]3[C:12]([CH3:22])=[C:13]([CH:18]=[CH:19][C:20]=3[CH3:21])[C:14]([O:16][CH3:17])=[O:15])=[O:9])[C:5]([CH3:23])=[CH:4][CH:3]=2)[CH2:32][CH2:31]1

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 634876Binap, (A+-)-HCID 114813284-((Tert-butyldimethylsilyl)oxy)piperidineHCID 86707343Methyl 3-[(6-chloro-3-methyl-pyridine-2-carbonyl)amino]-2,4-dimethyl-benzoate

Product 1

HCID 86707342Methyl 3-[[6-(4-hydroxy-1-piperidyl)-3-methyl-pyridine-2-carbonyl]amino]-2,4-dimethyl-benzoateYield 36.9%

Reagents, catalysts & solvents 2

HCID 9811564Bis(dibenzylideneacetone)palladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
120 °C

Procedure

To a solution of methyl 3-(6-chloro-3-methylpicolinamido)-2,4-dimethylbenzoate (0.50 g, 0.0015 mol), tert-butyl-dimethyl-(4-piperidyloxy)silane (0.90 g, 0.0045 mol) and Cs2CO3 (2.00 g, 0.006 mol) in toluene (6 ml) is added Pd2(dba)3 (0.14 g, 0.00015 mol) followed by BINAP (0.086 g, 0.00015 mol). The reaction mixture is purged with nitrogen for 5 minutes and then heated at 120° C. After 4 hours, the reaction is cooled to ambient temperature, filtered through Celite™, and washed with EtOAc. The combined filtrate is dried over sodium sulfate, filtered, and concentrated under reduced pressure to afford the title compound as a white semi-solid (0.220 g, 29%). Mass spectrum (m/z): 398.2 (M+1).

Workup

  1. customThe reaction mixture is purged with nitrogen for 5 minutes
  2. temperaturethe reaction is cooled to ambient temperature
  3. filtrationfiltered through Celite™
  4. washwashed with EtOAc
  5. dry with materialThe combined filtrate is dried over sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-2865ab0819e54ff08b9e87635f405316
Source dataset
uspto-grants-2015_01
Patent number
US08933098B2

Reaction notes

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