1-azidooctane

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-[3-cyano-4-(4-ethynyl-phenyl)-5,5-dimethyl-5H-furan-2-ylidene]malononitrile (90 mg, 0.34 mmol) and 1-azidooctane (80 mg, 0.51 mmol) in 15 mL ethanol was stirred at 50° C. under nitrogen and a solution of sodium ascorbate (25 mg, 0.12 mmol in 1 mL water) was added, followed by copper sulfate (15 mg, 0.06 mmol in 1 mL water) solution. The resulting mixture was stirred at the same temperature for 24 h, cooled and the reaction mixture was poured into cold water (100 mL). The mixture was stirred overnight at room temperature, the precipitate formed was filtered off and air dried. The crude product was recrystallized from dichloromethane/1-propanol. Yield: 70 mg (46%) Mp (DSc): 203° C.; IR (neat) 2933, 2974, 2266, 1574, 1565 cm−1; 1H NMR (400 MHz, CDCl3) δ 8.02 (d, J=8.4 Hz 2H), 7.87 (s, 1H), 7.85 (d, J=8.4 Hz, 2H), 4.39 (t, J=7.2 Hz, 2H), 1.94-1.96 (m, 2H), 1.82 (s, 6H), 1.20-1.31 (m, 10H), 0.82 (t, 3H); 13C NMR (CDCl3) δ 176.69, 175.14, 145.30, 136.33, 129.01, 126.40, 125.91, 121.03, 111.20, 110.47, 110.38, 100.79, 99.08, 59.85, 50.44, 31.41, 30.01, 29.41, 28.76, 28.66, 26.20, 22.31, 13.78; Anal. Calcd for C26H28N6O: C, 70.89; H, 6.41, N 19.08. Found: C, 70.59, H, 6.18; N, 19.37. UV-Vis (CH2Cl2): λmax=384 nm ε=3.01×104 L·mol−1 cm−1. The resulting mixture was stirred at the same temperature for 24 h cooled The mixture was stirred overnight at room temperature the precipitate formed was filtered off air dried The crude product was recrystallized from dichloromethane/1-propanol 203° C.

Conditions: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of 2-[3-cyano-4-(4-ethynyl-phenyl)-5,5-dimethyl-5H-furan-2-ylidene]malononitrile (90 mg, 0.34 mmol) and 1-azidooctane (80 mg, 0.51 mmol) in 15 mL ethanol was stirred at 50° C. under nitrogen and a solution of sodium ascorbate (25 mg, 0.12 mmol in 1 mL water) was added, followed by copper sulfate (15 mg, 0.06 mmol in 1 mL water) solution. The resulting mixture was stirred at the same temperature for 24 h, cooled and the reaction mixture was poured into cold water (100 mL). The mixture was stirred overnight at room temperature, the precipitate formed was filtered off and air dried. The crude product was recrystallized from dichloromethane/1-propanol, Yield: 70 mg (46%) Mp (DSc): 203° C.; IR (neat) 2933, 2974, 2266, 1574, 1565 cm−1, 1H NMR (400 MHz, CDCl3) δ 8.02 (d, J=8.4 Hz 2H), 7.87 (s, 1H), 7.85 (d, J=8.4 Hz, 2H), 4.39 (t, J=7.2 Hz, 2H), 1.94-1.96 (m, 2H), 1.82 (s, 6H), 1.20-1.31 (m, 10H), 0.82 (t, 3H); 13C NMR (CDCl3) δ 176.69, 175.14, 145.30, 136.33, 129.01, 126.40, 125.91, 121.03, 111.20, 110.47, 110.38, 100.79, 99.08, 59.85, 50.44, 31.41, 30.01, 29.41, 28.76, 28.66, 26.20, 22.31, 13.78; Anal. Calcd for C26H28N6O: C, 70.89; H, 6.41, N, 19.08. Found: C, 70.59, H, 6.18; N, 19.37. UV-Vis (CH2Cl2): λmax=384 nm ε=3.01×104 L.mol−1cm−1. The resulting mixture was stirred at the same temperature for 24 h cooled The mixture was stirred overnight at room temperature the precipitate formed was filtered off air dried The crude product was recrystallized from dichloromethane/1-propanol, Yield: 70 mg (46%) Mp (DSc) 203° C.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: In a 100 mL round bottomed flask, sodium azide (2.60 g, 37.6 mmol) was dissolved in 80 mL DMSO, 1-Octyl bromide (5.5 g, 28.4 mmol) was added and stirred at room temperature for 5 h. The reaction was quenched by addition of water (200 mL) and was stirred for 1 h. The mixture was extracted with diethyl ether (50×3). The combined organic layers were washed with brine solution. The ether solution was dried over anhydrous MgSO4 and the solvent was removed by rotary evaporation. The product was further purified by filtration through a short silica gel column using hexane as eluent. Yield: 2.5 g (78%) IR (neat) 2957, 2857, 2093, 1466, 1377, 1279 cm−1; 1H NMR (400 MHz, CDCl3) δ 3.21 (d, J=6.2 Hz, 2H), 1.55-1.57 (m, 2H), 1.25-1.32 (m, 10H), 0.84 (m, 3H); 13C NMR (CDCl3) δ 51.51, 31.80, 29.19, 29.16, 28.89, 26.77, 22.66, 14.06, The reaction was quenched by addition of water (200 mL) was stirred for 1 h The mixture was extracted with diethyl ether (50×3) The combined organic layers were washed with brine solution The ether solution was dried over anhydrous MgSO4 the solvent was removed by rotary evaporation The product was further purified by filtration through a short silica gel column