Potassium Phosphate, Tribasic → HCID 68272024, compound

HRID 715168Notes

Reaction equation

HRID 715168 reaction equation
Br[C:2]1[C:3]([N:7]2[C:15]3[CH:14]=[CH:13][C:12]([CH3:16])=[CH:11][C:10]=3[C:9]3[CH2:17][N:18]([CH3:21])[CH2:19][CH2:20][C:8]2=3)=[CH:4][S:5][CH:6]=1.[N:22]1[CH:27]=[CH:26][C:25](B(O)O)=[CH:24][CH:23]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>CN(C=O)C.O.O>[CH3:21][N:18]1[CH2:19][CH2:20][C:8]2[N:7]([C:3]3[C:2]([C:25]4[CH:26]=[CH:27][N:22]=[CH:23][CH:24]=4)=[CH:6][S:5][CH:4]=3)[C:15]3[CH:14]=[CH:13][C:12]([CH3:16])=[CH:11][C:10]=3[C:9]=2[CH2:17]1

Participants

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 2734379(Pyridin-4-yl)boronic acidHCID 67373536HCID 67373536, compound

Product 1

HCID 68272024HCID 68272024, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21962138N,N-Dimethylformamide--water (1/1)Solvent

Conditions

Temperature
95 °C

Procedure

To a de-aerated solution of 5-(4-bromo-thiophen-3-yl)-2,8-dimethyl-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole (160 mg, 0.44 mmol), 4-pyridinylboronic acid (81.9 mg, 0.66 mmol) and K3PO4 (235 mg, 1.11 mmol) in DMF-water (4.5:0.5 mL) was added dichlorobis(triphenylphosphine) palladium (II) (15.5 mg, 5 mol %). The reaction mixture was heated at 95° C. for 30 min under nitrogen atmosphere. The reaction mixture was diluted with water and extracted with EtOAc. The organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure to afford crude material, which was purified by reverse phase HPLC to yield 2,8-dimethyl-5-(4-pyridin-4-yl-thiophen-3-yl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole as an off white solid (90 mg). 1H NMR (Oxalate salt, CD3OD) d (ppm): 8.4-8.3 (bs, 2H), 8.19 (s, 1H), 7.8 (s, 1H), 7.35 (s, 1H), 7.05-6.9 (m, 4H), 4.7-4.5 (m, 2H), 3.7-3.5 (m, 2H), 3.1 (s, 3H), 3.05-3.0 (m, 1H), 2.7-2.59 (m, 1H), 2.4 (s, 3H).

Workup

  1. extractionextracted with EtOAc
  2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  3. concentrationconcentrated under reduced pressure
  4. customto afford crude material, which
  5. customwas purified by reverse phase HPLC

Sources & evidence

ORD record
ord-7b52f4b8f6854738a6694c98f383817f
Source dataset
uspto-grants-2015_11
Patent number
US09187471B2

Reaction notes

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