Sodium Carbonate → 3'-Methylene-2',3',6,7,8,9-hexahydrospiro[imidazo[1,5-a]azepine-5,1'-indene]-5'-carbonitrile

HRID 1877973Notes

Reaction equation

HRID 1877973 reaction equation
[CH2:1]([C:4]1([C:14]2[CH:21]=[CH:20][C:17]([C:18]#[N:19])=[CH:16][C:15]=2Br)[N:10]2[CH:11]=[N:12][CH:13]=[C:9]2[CH2:8][CH2:7][CH2:6][CH2:5]1)[CH:2]=[CH2:3].C(=O)([O-])[O-].[Na+].[Na+].FC1C=CC(B(O)O)=CC=1>[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.COCCOC>[CH2:3]=[C:2]1[C:21]2[C:14](=[CH:15][CH:16]=[C:17]([C:18]#[N:19])[CH:20]=2)[C:4]2([N:10]3[CH:11]=[N:12][CH:13]=[C:9]3[CH2:8][CH2:7][CH2:6][CH2:5]2)[CH2:1]1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 2856454-Fluorophenylboronic acidHCID 588270494-(5-allyl-6,7,8,9-tetrahydro-5H-imidazo[1,5-a]azepin-5-yl)-3-bromobenzonitrile

Product 1

HCID 588270643'-Methylene-2',3',6,7,8,9-hexahydrospiro[imidazo[1,5-a]azepine-5,1'-indene]-5'-carbonitrile

Reagents, catalysts & solvents 2

HCID 11979704Tetrakis(triphenylphosphine)palladiumCatalystHCID 80711,2-DimethoxyethaneSolvent

Conditions

Temperature
130 °C

Procedure

To 4-(5-allyl-6,7,8,9-tetrahydro-5H-imidazo[1,5-a]azepin-5-yl)-3-bromobenzonitrile (0.275 g, 0.76 mmol) is added DME (3.0 mL). To this solution is added aqueous 2M sodium carbonate (1.5 ml, 3.0 mmol) followed by 4-fluorophenylboronic acid (0.269 g, 1.92 mmol). This mixture is transferred to a microwave safe vial. Tetrakis(triphenylphosphine) palladium(0) (0.04 g, 0.034 mmol) is added, and the vessel sealed. The mixture is stirred briefly (30 seconds) and place in a microwave for 25 minutes at 130° C. The vial is allowed to cool and unsealed. The mixture is extracted with ethyl acetate and washed with saturated aqueous sodium bicarbonate. The separated organic layer is concentrated in vacuo. The resulting material is subjected to two sequential chromatography procedures (1: Silica gel, 1:50 to 1:25 methanol:methylene chloride. 2: Reverse phase HPLC, gradient 10-95% Acetonitrile:Water, pH2, over 8 minutes) to give the product. MS (ESI) m/z 276 (M+H); 1H NMR (400 MHz, CDCl3) δ ppm 1.47-1.61 (m, 1 H), 1.85-1.99 (m, 1 H), 2.01-2.16 (m, 3 H), 2.25-2.36 (m, 1 H), 2.63 (t, 1 H), 2.99 (d, J=16.4 Hz, 1 H), 3.10 (dd, J=15.5, 5.7 Hz, 1 H), 3.23-3.32 (m, 1 H), 5.21-5.25 (m, 1 H), 5.62-5.67 (m, 1 H), 6.50 (s, 1 H), 6.78 (s, 1 H), 7.54-7.58 (m, 1 H), 7.66-7.70 (m, 1 H), 7.88 (s, 1 H).

Workup

  1. customthe vessel sealed
  2. temperatureto cool
  3. extractionThe mixture is extracted with ethyl acetate
  4. washwashed with saturated aqueous sodium bicarbonate
  5. concentrationThe separated organic layer is concentrated in vacuo
  6. customis subjected to two sequential chromatography procedures (1: Silica gel, 1:50 to 1:25 methanol:methylene chloride. 2: Reverse phase HPLC, gradient 10-95% Acetonitrile:Water, pH2, over 8 minutes)
  7. customto give the product

Sources & evidence

ORD record
ord-46d2880fb7ca4b838f8d9dccbb3127b6
Source dataset
uspto-grants-2012_11
Patent number
US08314097B2

Reaction notes

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