Potassium Carbonate → HCID 68284207, compound

HRID 2408694Notes

Reaction equation

HRID 2408694 reaction equation
Br[C:2]1[CH2:6][CH2:5][CH2:4][C:3]=1[N:7]1[C:15]2[CH:14]=[CH:13][C:12]([CH3:16])=[CH:11][C:10]=2[C:9]2[CH2:17][N:18]([CH3:21])[CH2:19][CH2:20][C:8]1=2.[CH3:22][C:23]1[CH:28]=[CH:27][C:26](B2OC(C)(C)C(C)(C)O2)=[CH:25][N:24]=1.C([O-])([O-])=O.[K+].[K+]>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>[CH3:21][N:18]1[CH2:19][CH2:20][C:8]2[N:7]([C:3]3[CH2:4][CH2:5][CH2:6][C:2]=3[C:26]3[CH:25]=[N:24][C:23]([CH3:22])=[CH:28][CH:27]=3)[C:15]3[CH:14]=[CH:13][C:12]([CH3:16])=[CH:11][C:10]=3[C:9]=2[CH2:17]1

Participants

7

Reactant 3

HCID 11430Potassium CarbonateHCID 164142722-Methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridineHCID 68284008HCID 68284008, compound

Product 1

HCID 68284207HCID 68284207, compoundYield 25.1%

Reagents, catalysts & solvents 3

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

Conditions

Temperature
90 °C

Procedure

5-(2-Bromocyclopent-1-enyl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (100 mg, 0.29 mmol), 2-methyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine (127 mg, 0.58 mmol) and K2CO3 (120 mg, 0.87 mmol) were mixed in 1,2-dimethoxyethane (4 mL) and water (2 mL). The reaction mixture was purged with nitrogen, Pd(PPh3)4 (17 mg, 0.0147 mmol) was added and the reaction mixture was heated at 90° C. for 45 min. The reaction mixture was cooled to RT and concentrated under reduced pressure. The residue was diluted with water (20 mL) and extracted with EtOAc (50 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by reverse phase HPLC to yield 26 mg of 2,8-dimethyl-5-(2-(6-methylpyridin-3-yl)cyclopent-1-enyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole as the TFA salt. 1H NMR (CD3OD, TFA salt) δ (ppm): 8.0 (d, 1H), 7.8 (dd, 1H), 7.61 (d, 1H), 7.31 (s, 1H), 6.95-7.10 (m, 2H), 4.7 (d, 1H), 4.38 (d, 1H), 3.8 (m, 1H), 3.55 (m, 1H), 2.82-3.2 (m, 9H), 2.61 (s, 3H), 2.4 (s, 3H), 2.3 (m, 2H).

Workup

  1. additionwas added
  2. temperatureThe reaction mixture was cooled to RT
  3. concentrationconcentrated under reduced pressure
  4. additionThe residue was diluted with water (20 mL)
  5. extractionextracted with EtOAc (50 mL)
  6. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by reverse phase HPLC

Sources & evidence

ORD record
ord-cd822263f33e4152afa51c4a84147b1a
Source dataset
uspto-grants-2014_08
Patent number
US08815843B2

Reaction notes

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