2-(triphenyl-lambda5-phosphanylidene)acetonitrile

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

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

Procedure: In a 20 mL scintillation vial, ((R)-1-methyl-2-oxo-ethyl)-carbamic acid tert-butyl ester (2.5 g, 14.4 mmol) and (triphenylphosphoranylidene)acetonitrile (6.52 g, 21.7 mmol) were mixed in dichloromethane (20 mL) and stirred at room temperature for 16 h. The solvent was evaporated to give the crude material, which was purified by column chromatography (silica gel, gradient n-hexanes ethyl acetate) to provide 1.8 g (63%) of ((R)-3-cyano-1-methyl-allyl)-carbamic acid tert-butyl ester in a 3:1 diastereoselectivity (E:Z) as a colorless oil. 1H NMR (300 MHz, CDCl3) δ ppm 6.38-6.79 (m, 1H), 5.47 (dd, J=16.24, 1.89 Hz, 1H), 4.48 (bs, 1H), 4.47 (bs, 1H), 1.45 (s, 1H), 1.28 (d, J=7.18 Hz, 9H). The solvent was evaporated to give the crude material, which was purified by column chromatography (silica gel, gradient n-hexanes ethyl acetate)

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

Procedure: In a 20 mL scintillation vial, ((R)-1-methyl-2-oxo-ethyl)-carbamic acid tert-butyl ester (2.5 g, 14.4 mmol) and (triphenylphosphoranylidene)acetonitrile (6.52 g, 21.7 mmol) were mixed in dichloromethane (20 mL) and stirred at room temperature for 16 h. The solvent was evaporated to give the crude material, which was purified by column chromatography (silica gel, gradient n-hexanes ethyl acetate) to provide 1.8 g (63%) of ((R)-3-cyano-1-methyl-allyl)-carbamic acid tert-butyl ester in a 3:1 diastereoselectivity (E:Z) as a colorless oil. 1H NMR (300 MHz, CDCl3) δ ppm 6.38-6.79 (m, 1H), 5.47 (dd, J=16.24, 1.89 Hz, 1H), 4.48 (bs, 1H), 4.47 (bs, 1H), 1.45 (s, 1H), 1.28 (d, J=7.18 Hz, 9H). The solvent was evaporated to give the crude material, which was purified by column chromatography (silica gel, gradient n-hexanes ethyl acetate)

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

Procedure: A solution of 6-amino-5-formyl-1,3-diphenyluracil (5.0 g, 16.3 mmol) and 2-(triphenylphosphoranylidene)acetonitrile (5.9 g, 19.6 mmol) in anhydrous acetonitrile (100 mL) was heated to reflux for 24 hours in an argon stream. The reaction mixture was allowed to cool and the solvent was evaporated therefrom in vacuo. The crude crystals separated out therefrom were recrystallized from benzene to give 7-amino-1,2,3,4-tetrahydro-1,3-diphenylpyrido[2,3-d]pyrimidine-2,4-dione (2.4 g) in a 45% yield. to reflux for 24 hours in an argon stream to cool the solvent was evaporated The crude crystals separated out therefrom were recrystallized from benzene

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

Procedure: A mixture of 5,6-dimethoxybenzo[b]thiophene-2-carboxaldehyde (8.14 g) and cyanomethylene triphenylphosphorane (22.06 g) in dry toluene (270 ml) was stirred and heated to reflux for 1 hour. The reaction mixture was then evaporated to dryness and the residue was dissolved in a mixture of dichloromethane (50 ml) and toluene (50 ml) and passed through a column of coarse silica (0.2-0.5 mm, Merck, 600 g). The column eluted with toluene:ethyl acetate (4:1 v/v). The appropriate fractions were combined and evaporated to dryness and the residue was crystallised from dichloromethane:diethyl ether to give pure (E)-3-(5,6-dimethoxy-benzo[b]thiophene-2-yl)-2-propenenitrile (7.56 g), m.p. 154°-158° C. heated to reflux for 1 hour The reaction mixture was then evaporated to dryness the residue was dissolved in a mixture of dichloromethane (50 ml) and toluene (50 ml) The column eluted with toluene:ethyl acetate (4:1 v/v) evaporated to dryness the residue was crystallised from dichloromethane

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

Procedure: A mixture of the product from Example 56C (2.0 g, 8.6 mmol) and (triphenylphosphoranylidene)acetonitrile (2.87 g, 9.5 mmol) in toluene (30 mL) was refluxed for 24 hours. The reaction was cooled to room temperature and filtered through a short plug of silica gel eluting with diethyl ether to remove the triphenyl phosphine oxide. The filtrate was concentrated and the residue was purified via flash chromatography on a silica gel:column (5:95 ethyl acetate:hexane) to afford the title compound and the corresponding Z isomer. 1H NMR (300 MHz, DMSO-d6) δ ppm 3.88 (s, 3H) 6.55 (d, J=16.27 Hz, 1H) 8.05 (d, J=16.95 Hz, 1H) 8.09 (s, 1H) 8.13 (s, 1H); MS (DCI+) m/z 273.0 [M+H]+. was refluxed for 24 hours filtered through a short plug of silica gel eluting with diethyl ether to remove the triphenyl phosphine oxide The filtrate was concentrated the residue was purified via flash chromatography on a silica gel

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

Procedure: To 4-chloroisobenzofuran-1,3-dione (1.82 g, 10 mmol) in tetrahydrofuran (20 mL) was added lithium tri-tert-butoxyaluminum hydride (0.5 M, 20 mL, 10 mmol, diglyme) at −20° C. The mixture was stirred at room temperature overnight. (Triphenylphosphoranylidene)acetonitrile (3.0 g, 10 mmol) was added, and the resultant mixture was heated at 120° C. for 16 hours. 2 N Sodium hydroxide(aq) was added and the mixture was extracted with ethyl acetate (2×). HCl(aq) (1 M) was added to the aqueous layer to pH3, and the mixture was extracted with ethyl acetate. The organic extracts was dried and concentrated. The residue was dissolved in 20 mL of 1:1 CH2Cl2:methanol followed by the addition of (trimethylsilyl)diazomethane (4 mL, 2 N in diethyl ether, 8 mmol). The mixture was stirred for 1 hour and quenched with acetic acid. The mixture was concentrated and purified by silica gel column chromatography eluting with 2:1 hexanes:ethyl acetate to afford the title compound. 1H NMR (500 MHz, DMSO-d6) δ ppm 7.85 (dd, J=1.0, 7.5 Hz, 1H), 7.81 (dd, J=1.0, 8.0 Hz, 1H), 6.04 (d, J=17 Hz, 1H), and 3.84 (s, 3H). the mixture was extracted with ethyl acetate (2×) HCl(aq) (1 M) was added to the aqueous layer to pH3 the mixture was extracted with ethyl acetate The organic extracts was dried concentrated The residue was dissolved in 20 mL of 1:1 CH2Cl2 The mixture was stirred for 1 hour quenched with acetic acid The mixture was concentrated purified by silica gel column chromatography eluting with 2:1 hexanes

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

Procedure: To 4-chloroisobenzofuran-1,3-dione (1.82 g, 10 mmol) in tetrahydrofuran (20 mL) was added lithium tri-tert-butoxyaluminum hydride (0.5 M, 20 mL, 10 mmol, diglyme) at −20° C. The mixture was stirred at room temperature overnight. (Triphenylphosphoranylidene)acetonitrile (3.0 g, 10 mmol) was added, and the resultant mixture was heated at 120° C. for 16 hours. 2 N Sodium hydroxide(aq) was added and the mixture was extracted with ethyl acetate (2×). HCl(aq) (1 M) was added to the aqueous layer to pH3, and the mixture was extracted with ethyl acetate. The organic extracts was dried and concentrated. The residue was dissolved in 20 mL of 1:1 CH2Cl2:methanol followed by the addition of (trimethylsilyl)diazomethane (4 mL, 2 N in diethyl ether, 8 mmol). The mixture was stirred for 1 hour and quenched with acetic acid. The mixture was concentrated and purified by silica gel column chromatography eluting with 2:1 hexanes:ethyl acetate to afford the title compound. 1H NMR (500 MHz, DMSO-d6) δ ppm 7.85 (dd, J=1.0, 7.5 Hz, 1H), 7.81 (dd, J=1.0, 8.0 Hz, 1H), 6.04 (d, J=17 Hz, 1H), and 3.84 (s, 3H). the mixture was extracted with ethyl acetate (2×) HCl(aq) (1 M) was added to the aqueous layer to pH3 the mixture was extracted with ethyl acetate The organic extracts was dried concentrated The residue was dissolved in 20 mL of 1:1 CH2Cl2 The mixture was stirred for 1 hour quenched with acetic acid The mixture was concentrated purified by silica gel column chromatography eluting with 2:1 hexanes

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 2-formylbenzoate (10 g, 60.9 mmol) was dissolved in toluene (200 mL). (Triphenylphosphoranylidene)acetonitrile (20.19 g, 67.0 mmol) was then added to the mixture. The reaction was heated at 110° C. for 20 hours, then cooled to room temperature, concentrated under vacuum and the residue was triturated with ether (2×). The ether solution was passed though a plug of silica gel to provide Example 1A (mixture of E and Z isomers). The mixture of E and Z isomers was used directly for the next step. MS (DCI+) m/z 205.0 [M+NH3]+. cooled to room temperature concentrated under vacuum the residue was triturated with ether (2×) to provide Example 1A (mixture of E and Z isomers) The mixture of E and Z isomers

Conditions: temp:110.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Methyl 2-formylbenzoate (10 g, 60.9 mmol) was dissolved in toluene (200 mL). (Triphenylphosphoranylidene)acetonitrile (20.19 g, 67.0 mmol) was then added to the mixture. The reaction was heated at 110° C. for 20 hours, then cooled to room temperature, concentrated under vacuum and the residue was triturated with ether (2×). The ether solution was passed though a plug of silica gel to provide Example 1A (mixture of E and Z isomers). The mixture of E and Z isomers was used directly for the next step. MS (DCI+) m/z 205.0 [M+NH3]+. cooled to room temperature concentrated under vacuum the residue was triturated with ether (2×) to provide Example 1A (mixture of E and Z isomers) The mixture of E and Z isomers

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

Procedure: To the mixture of (triphenylphosphanylidene)acetonitrile (19.8 g, 51.9 mmol) and NaOH (2.59 g, 64.9 mmol) in DCM (30 mL) and water (60 mL) was added 4-{[4-chloro-3-(trifluoromethyl)phenyl]oxy}benzaldehyde (13.0 g, 43.2 mmol)) at 0° C. It was stirred at rt for 4 h. Purification via a flash chromatography afforded the title compound as a white solid (12 g). Purification via a flash chromatography