Acetic Acid → N1-(benzo[d]isothiazol-3-yl)-N3-((4'-methoxybiphenyl-4-yl)methyl)propane-1,3-diamine

HRID 502566Notes

Reaction equation

HRID 502566 reaction equation
[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[C:3]([NH:10][CH2:11][CH2:12][CH2:13][NH2:14])=[N:2]1.[CH3:15][O:16][C:17]1[CH:22]=[CH:21][C:20]([C:23]2[CH:28]=[CH:27][C:26]([CH:29]=O)=[CH:25][CH:24]=2)=[CH:19][CH:18]=1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(O)(=O)C>ClCCCl>[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[C:3]([NH:10][CH2:11][CH2:12][CH2:13][NH:14][CH2:29][C:26]2[CH:25]=[CH:24][C:23]([C:20]3[CH:21]=[CH:22][C:17]([O:16][CH3:15])=[CH:18][CH:19]=3)=[CH:28][CH:27]=2)=[N:2]1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 13944874'-Methoxy-(1,1'-biphenyl)-4-carboxaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 57436551N1-(benzo[d]isothiazol-3-yl)propane-1,3-diamine

Product 1

HCID 58726830N1-(benzo[d]isothiazol-3-yl)-N3-((4'-methoxybiphenyl-4-yl)methyl)propane-1,3-diamineYield 29.2%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

N1-(Benzo[d]isothiazol-3-yl)propane-1,3-diamine (600 mg, 2.8 mmol) and 4′-methoxy-biphenyl-4-carboxaldehyde (614 mg, 2.8 mmol) were combined in 1,2-dichloroethane (20 mL) and treated with sodium triacetoxyborohydride (1.2 g, 5.7 mmol) and acetic acid (160 μL, 5.6 mmol). The mixture was stirred at room temperature overnight. The reaction was quenched by addition of saturated aqueous sodium bicarbonate solution. The crude product was extracted with ethyl acetate (2×50 mL). The organic extract was dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by column chromatography, on silica gel, eluting with 98:2 methylene chloride: methanol to yield N1-(benzo[d]isothiazol-3-yl)-N3-((4′-methoxybiphenyl-4-yl)methyl)propane-1,3-diamine (330 mg) as a light yellow foam. 1H NMR (CDCl3): 7.80 (d, 1H), 7.75 (d, 1H), 7.25-7.45 (m, 8H), 6.90 (d, 2H), 3.95 (s, 2H), 3.85 (s, 3H), 3.70 (t, 2H), 3.00 (t, 2H), 2.30-2.40 ppm (m, 2H).

Workup

  1. customThe reaction was quenched by addition of saturated aqueous sodium bicarbonate solution
  2. extractionThe crude product was extracted with ethyl acetate (2×50 mL)
  3. extractionThe organic extract
  4. dry with materialwas dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe resulting residue was purified by column chromatography, on silica gel
  8. washeluting with 98:2 methylene chloride

Sources & evidence

ORD record
ord-0b03cffb4a1c4688b2a28eae2f6c1950
Source dataset
uspto-grants-2010_08
Patent number
US07776847B2

Reaction notes

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