Sodium Carbonate → HCID 44554481, compound

HRID 1661602Notes

Reaction equation

HRID 1661602 reaction equation
[C:1]([N:8]1[C:16]2[C:11](=[CH:12][C:13]([C:17]#[N:18])=[CH:14][CH:15]=2)[CH:10]=[C:9]1B(O)O)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].Br[C:23]1[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=1.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC>[C:4]([O:3][C:1]([N:8]1[C:16]2[C:11](=[CH:12][C:13]([C:17]#[N:18])=[CH:14][CH:15]=2)[CH:10]=[C:9]1[C:23]1[CH:24]=[N:25][CH:26]=[CH:27][CH:28]=1)=[O:2])([CH3:7])([CH3:6])[CH3:5]

Participants

5

Reactant 3

HCID 10340Sodium CarbonateHCID 122863-BromopyridineHCID 42364971-Boc-5-cyano-1H-indole-2-boronic acid

Product 1

HCID 44554481HCID 44554481, compound

Reagents, catalysts & solvents 1

HCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
130 °C

Procedure

A mixture of 1-Boc-5-cyanoindole-2-boronic acid (339 mg, 1.19 mmol), 3-bromo-pyridine (150 mg, 93 uL, 0.95 mmol), aqueous sodium carbonate (2M, 0.95 mL, 1.9 mmol) and DME (4 mL) is degassed with nitrogen and PS—Pd(PPh3) (285 mg, 0.11 mmol/g, 0.028 mmol) is added. The resulting mixture is then heated in the microwave at 120° C. for 20 min and at 130° C. for 25 min (three times). The reaction mixture is filtered through a sintered funnel and washed with dichloromethane (50 mL). The filtrate is dried over Na2SO4, filtered, and concentrated. The residue is purified by reverse phase HPLC (5 to 80% acetonitrile-0.1% aqueous ammonia) to give 5-cyano-2-pyridin-3-yl-indole-1-carboxylic acid tert-butyl ester as a solid. 1H NMR (400.3 MHz, CDCl3) δ ppm 1.34 (s, 9H), 6.67 (s, 1H), 7.39 (dd, J=4.9, 7.8 Hz, 1H), 7.61 (dd, J=1.6, 8.7 Hz, 1H), 7.74 (m, 1H), 7.92 (s, 1H), 8.35 (d, J=8.7 Hz, 1H), 8.65 (dd, J=1.6 Hz, 4.9 Hz, 1H), 8.69 (d, J=2.2 Hz, 1H). MS (ESI) m/z 320 (M+H)+.

Workup

  1. additionis added
  2. filtrationThe reaction mixture is filtered through a sintered funnel
  3. washwashed with dichloromethane (50 mL)
  4. dry with materialThe filtrate is dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue is purified by reverse phase HPLC (5 to 80% acetonitrile-0.1% aqueous ammonia)

Sources & evidence

ORD record
ord-b028575cf9e74116a2a9478310c3c14b
Source dataset
uspto-grants-2011_10
Patent number
US08030334B2

Reaction notes

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