Sodium Bicarbonate → HCID 59176539, compound

HRID 2196617Notes

Reaction equation

HRID 2196617 reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[CH:10]=O)[CH:3]=[CH:2]1.[N:12]1[C:21]2[CH:20]([NH:22][CH2:23][CH2:24][CH2:25][CH2:26][NH:27][C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])[CH2:19][CH2:18][CH2:17][C:16]=2[CH:15]=[CH:14][CH:13]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)(O)[O-].[Na+]>ClCCCl.C(O)(=O)C>[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][C:8]=2[CH2:10][N:22]([CH:20]2[C:21]3[N:12]=[CH:13][CH:14]=[CH:15][C:16]=3[CH2:17][CH2:18][CH2:19]2)[CH2:23][CH2:24][CH2:25][CH2:26][NH:27][C:28](=[O:34])[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])[CH:3]=[CH:2]1

Participants

7

Reactant 4

HCID 516892Sodium BicarbonateHCID 2734629Indole-7-carboxaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 42609132558446-23-4

Product 1

HCID 59176539HCID 59176539, compoundYield 35%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidCatalystHCID 111,2-DichloroethaneSolvent

Procedure

A heavy-walled Pyrex tube was charged with a solution of indole-7-carboxaldehyde (0.50 g, 3.44 mmol) in 1,2-dichloroethane (5 mL). This solution was treated with tert-butyl 4-(5,6,7,8-tetrahydroquinolin-8-ylamino)butylcarbamate, 3, (1.21 g, 3.78 mmol), sodium triacetoxyborohydride (1.46 g, 6.88 mmol) and a catalytic amount of acetic acid (2 drops). The reaction mixture was exposed to microwave irradiation for 10 min at a temperature of 100° C. After the irradiation, the reaction tube was cooled with high-pressure air until the temperature had fallen below 40° C. The crude reaction mixture was poured onto a saturated aqueous solution of sodium bicarbonate. The product was extracted with dichloromethane. The combined organic layers were washed with brine, dried over potassium carbonate, filtered and concentrated in vacuo. The crude product was purified by silica gel chromatography (0-5% methanol/CH2Cl2) to afford 0.54 g (35% yield) of the desired product 6: 1H NMR (400 MHz, CDCl3) δ 12.87 (bs, 1H), 8.56 (d, J=3.6 Hz, 1H), 7.53 (d, J=7.6 Hz, 1H), 7.41-7.37 (m, 2H), 7.10 (dd, J=5.2, 7.6 Hz, 1H), 6.97-6.88 (m, 2H), 6.51-6.49 (m, 1H), 4.26-4.20 (m, 2H), 3.96 (d, J=13.2 Hz, 1H), 3.60 (d, J=13.2 Hz, 1H), 2.92-2.72 (m, 3H), 2.65-2.55 (m, 2H), 2.50-2.40 (m, 1H), 2.29-2.20 (m, 1H), 2.14-2.04 (m, 1H), 1.95-1.68 (m, 2H), 1.47-1.15 (m, 2H), 1.39 (s, 9H); ESI+ MS: m/z (rel intensity) 449.2 (100, [M+H]+) Step b: Preparation of N1-((1H-indol-7-yl)methyl)-N1-(5,6,7,8-tetrahydroquinolin-8-yl)butane-1,4-diamine (B). A solution of tert-butyl 4-(((1H-indol-7-yl)methyl)(5,6,7,8-tetrahydroquinolin-8-yl)amino)butylcarbamate, 6, (0.27 g, 0.60 mmol) in methanol (5 mL) was treated with thionyl chloride (1 mL) at room temperature. The resulting mixture was stirred for 30 min. The reaction mixture was then concentrated and dried under reduced pressure to afford 0.26 g (87% yield) of the desired product, B: 1H NMR (400 MHz, d6-DMSO) δ 11.97 (bs, 1H), 8.44 (d, J=4.8 Hz, 1H), 7.59 (d, J=7.2 Hz, 1H), 7.53 (d, J=7.2 Hz, 1H), 7.48-7.40 (m, 1H), 7.35-7.20 (m, 2H), 6.98 (t, J=6.8 Hz, 1H), 6.44 (bs, 1H), 4.90-4.78 (m, 2H), 3.60-3.53 (m, 2H), 3.10-3.00 (m, 2H), 2.80-2.60 (m, 4H), 2.50-2.39 (m, 1H), 2.30-1.40 (m, 7H); ESI+ MS: m/z (rel intensity) 349.2 (100, [M+H]+).

Workup

  1. customirradiation for 10 min at a temperature of 100° C
  2. customAfter the irradiation
  3. temperaturethe reaction tube was cooled with high-pressure air until the temperature
  4. customhad fallen below 40° C
  5. customThe crude reaction mixture
  6. extractionThe product was extracted with dichloromethane
  7. washThe combined organic layers were washed with brine
  8. dry with materialdried over potassium carbonate
  9. filtrationfiltered
  10. concentrationconcentrated in vacuo
  11. customThe crude product was purified by silica gel chromatography (0-5% methanol/CH2Cl2)

Sources & evidence

ORD record
ord-6b933bb0e4bf41ca8a5f095946c9d05b
Source dataset
uspto-grants-2012_12
Patent number
US08338448B2

Reaction notes

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