ethyl 2-chloro-3-oxo-3-phenylpropanoate

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: A mixture of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, EXAMPLE 1, 6.8 g, 30 mmol) in dichloromethane (68 ml) is cooled to −50 and a solution of zinc borohydride (0.4 M, 38 ml, 15 mmol) in ether is added dropwise over 30 mins. After the addition, the reaction mixture is stirred at 0° for 30 mins and then poured into a cold solution (0°) of acetic acid (5 ml) in water (15 ml). The resulting mixture is extracted with dichloromethane (30 ml×2). The combined organic extracts are washed with water (30 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is chromatographed (silica gel; ethyl acetate/hexane, (5/95 to 25/75) to give the title compound which is a 1:9 mixture of anti and syn isomers as determined by NMR. is cooled to −50 After the addition The resulting mixture is extracted with dichloromethane (30 ml×2) The combined organic extracts are washed with water (30 ml) dried over magnesium sulfate filtered concentrated under reduced pressure The residue is chromatographed (silica gel

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

Procedure: A solution of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, 100 g, 0.44 mol) and glacial acetic acid (25 ml, 0.44 mol) in ethanol 1 l) is cooled to −5° and stirred for 10 min. Sodium borohydride pellets (12.54 g, 0.33 mol, diam. 11 mm) are added in portions (4.2 g×3) with vigorous stirring. The reaction temperature is maintained at −5 to 0°. After the addition, the reaction mixture is stirred continuously at 0° for 5 hr and is then poured slowly into ice-water with stirring. The mixture is extracted with ethyl acetate (1 l). The organic phase is washed three times with water (100 ml) and saline (100 ml), dried over magnesium sulfate, and the solvent is removed under reduced pressure to give the title compound as a 1:4 mixture of the anti and syn isomers as determined by NMR, MS (m/z, CI+NH3) 246 (M++17), 228 (M+), 210, 194; “Anti” NMR (500 MHz, CDCl3) 7.60-7.50, 5.33, 4.64, 4.33, 1.33 δ;. CMR (300 MHz, CDCl3) 167.9, 138.2, 128.7, 128.5, 126.7, 74.6, 62.9, 62.2 and 13.7 δ; “Syn” NMR (500 MHz, CDCl3) 7.60-7.50, 5.24, 4.58, 4.44 and 1.46 δ; CMR (300 MHz, CDCl3) 168.9, 138.8, 126.7, 126.5, 126.9, 75.2, 62.3, 59.2 and 13.8 δ. are added in portions (4.2 g×3) with vigorous stirring The reaction temperature is maintained at −5 to 0° After the addition the reaction mixture is stirred continuously at 0° for 5 hr with stirring The mixture is extracted with ethyl acetate (1 l) The organic phase is washed three times with water (100 ml) and saline (100 ml) dried over magnesium sulfate the solvent is removed under reduced pressure

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

Procedure: A mixture of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, EXAMPLE 1, 6.8 g, 30 mmol) in dichloromethane (68 ml) is cooled to -5° and a solution of zinc borohydride (0.4 M, 38 ml, 15 mmol) in ether is added dropwise over 30 mins. After the addition, the reaction mixture is stirred at 0° for 30 mins and then poured into a cold solution (0°) of acetic acid (5 ml) in water (15 ml). The resulting mixture is extracted with dichloromethane (30 ml×2). The combined organic extracts are washed with water (30 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is chromatographed (silica gel; ethyl acetate/hexane, (5/95 to 25/75) to give the title compound which is a 1:9 mixture of anti and syn isomers as determined by NMR. is cooled to -5° After the addition The resulting mixture is extracted with dichloromethane (30 ml×2) The combined organic extracts are washed with water (30 ml) dried over magnesium sulfate filtered concentrated under reduced pressure The residue is chromatographed (silica gel

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

Procedure: A solution of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, 100 g, 0.44 mol) and glacial acetic acid (25 ml, 0.44 mol) in ethanol (1 l) is cooled to -5 ° and sirred for 10 min. Sodium borohydride pellets (12.54 g, 0.33 mol, diam. 11 mm) are aided in portions (4.2 g×3) with vigorous stirring. The reaction temperature is maintained at -5 to 0°. After the addition, the reaction mixture is stirred continuously at 0° for 5 hr and is then poured slowly into ice-water with stirring. The mixture is extracted with ethyl acetate (1 l). The organic phase is washed three times with water (100 ml) and saline (100 ml), dried over magnesium sulfate, and the solvent is removed under reduced pressure to give the title compound as a 1:4 mixture of the anti and syn isomers as determined by NMR, MS (m/z, CI+NH3) 246 (M+ +17), 228 (M+), 210, 194; "Anti" NMR (500 MHz, CDCl3) 7.60-7.50, 5.33, 4.64, 4.33, 1.33 δ; CMR (300 MHz, CDCl3) 167.9, 138.2, 128.7, 128.5, 126.7, 74.6, 62.9, 62.2 and 13.7 δ; "Syn" NMR (500 MHz, CDCl3) 7.60-7.50, 5.24, 4.58, 4.44 and 1.46 δ; CMR (300 MHz, CDCl3) 168.9, 138.8, 126.7, 126.5, 126.9, 75.2, 62.3, 59.2 and 13.8 δ. The reaction temperature is maintained at -5 to 0° After the addition with stirring The mixture is extracted with ethyl acetate (1 l) The organic phase is washed three times with water (100 ml) and saline (100 ml) dried over magnesium sulfate the solvent is removed under reduced pressure

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

Procedure: A solution of ethyl 2-chloro-3-oxo-3-phenylpropanoate (Example 23, 9.73 mmol) and thiourea (9.73 mmol) in EtOH (25 mL) was heated at reflux overnight. The resulting mixture was concentrated in vacuo, neutralized with 18M—NH4OH, and extracted with CH2Cl2. The organic phase was washed with brine, dried over anhydrous sodium sulfate, and concentrated to afford a yellow solid that was washed with MeOH (3 mL) and dried to afford the product in 89% yield as a pale yellow solid. MH+=249.1, Rf=0.29 (Hexanes:EtOAc=1:1). MH+=249.1, retention time (LC-MS)=2.37 min. at reflux overnight The resulting mixture was concentrated in vacuo extracted with CH2Cl2 The organic phase was washed with brine dried over anhydrous sodium sulfate concentrated to afford a yellow solid that was washed with MeOH (3 mL) dried to afford the product in 89% yield as a pale yellow solid

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

Procedure: A solution of ethyl 2-chloro-3-oxo-3-phenylpropanoate (Example 23, 9.73 mmol) and thiourea (9.73 mmol) in EtOH (25 mL) was heated at reflux overnight. The resulting mixture was concentrated in vacuo, neutralized with 18M—NH4OH, and extracted with CH2Cl2. The organic phase was washed with brine, dried over anhydrous sodium sulfate, and concentrated to afford a yellow solid that was washed with MeOH (3 mL) and dried to afford the product in 89% yield as a pale yellow solid. MH+=249.1, Rf=0.29 (Hexanes:EtOAc=1:1). MH+=249.1, retention time (LC-MS)=2.37 min. at reflux overnight The resulting mixture was concentrated in vacuo extracted with CH2Cl2 The organic phase was washed with brine dried over anhydrous sodium sulfate concentrated to afford a yellow solid that was washed with MeOH (3 mL) dried to afford the product in 89% yield as a pale yellow solid

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

Procedure: A solution of sulfuryl chloride (12.4 mmol) in toluene (5 mL) was added dropwise via an additional funnel to a solution of ethyl benzoylacetate (12.4 mmol) in toluene (20 mL) over 5 minutes at room temperature. The resulting mixture was stirred at room temperature overnight. Water was added slowly and resulting two-phase mixture was basified with saturated NaHCO3 and extracted with ethyl acetate. The combined organic extracts were washed with brine, dried over anhydrous sodium sulfate, and evaporated to afford 2.2 g (84%) of product as a pale yellow oil; MH+=227.0, retention time (LC-MS)=2.77 min. resulting two-phase mixture extracted with ethyl acetate The combined organic extracts were washed with brine dried over anhydrous sodium sulfate evaporated

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

Procedure: A mixture of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, EXAMPLE 1, 6.8 g, 30 mmol) in dichloromethane (68 ml) is cooled to −5° and a solution of zinc borohydride (0.4 M, 38 ml, 15 mmol) in ether is added dropwise over 30 mins. After the addition, the reaction mixture is stirred at 0° for 30 mins and then poured into a cold solution (0°) of acetic acid (5 ml) in water (15 ml). The resulting mixture is extracted with dichloromethane (30 ml×2). The combined organic extracts are washed with water (30 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is chromatographed (silica gel; ethyl acetate/hexane, (5/95 to 25/75) to give the title compound which is a 1:9 mixture of anti and syn isomers as determined by NMR. is cooled to −5° After the addition The resulting mixture is extracted with dichloromethane (30 ml×2) The combined organic extracts are washed with water (30 ml) dried over magnesium sulfate filtered concentrated under reduced pressure The residue is chromatographed (silica gel

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

Procedure: A mixture of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, EXAMPLE 1, 6.8 g, 30 mmol) in dichloromethane (68 ml) is cooled to −5° and a solution of zinc borohydride (0.4 M, 38 ml, 15 mmol) in ether is added dropwise over 30 mins. After the addition, the reaction mixture is stirred at 0° for 30 mins and then poured into a cold solution (0°) of acetic acid (5 ml) in water (15 ml). The resulting mixture is extracted with dichloromethane (30 ml×2). The combined organic extracts are washed with water (30 ml), dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is chromatographed (silica gel; ethyl acetate/hexane, (5/95 to 25/75) to give the title compound which is a 1:9 mixture of anti and syn isomers as determined by NMR. is cooled to −5° After the addition The resulting mixture is extracted with dichloromethane (30 ml×2) The combined organic extracts are washed with water (30 ml) dried over magnesium sulfate filtered concentrated under reduced pressure The residue is chromatographed (silica gel

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

Procedure: A solution of ethyl 2-chloro-3-oxo-3-phenylpropionate (CI, 100 g, 0.44 mol) and glacial acetic acid (25 ml, 0.44 mol) in ethanol (1 l) is cooled to −5° and stirred for 10 min. Sodium borohydride pellets (12.54 g, 0.33 mol, diam. 11 mm) are added in portions (4.2 g×3) with vigorous stirring. The reaction temperature is maintained at −5 to 0°. After the addition, the reaction mixture is stirred continuously at 0° for 5 hr and is then poured slowly into ice-water with stirring. The mixture is extracted with ethyl acetate (1 l). The organic phase is washed three times with water (100 ml) and saline (100 ml), dried over magnesium sulfate, and the solvent is removed under reduced pressure to give the title compound as a 1:4 mixture of the anti and syn isomers as determined by NMR, MS (m/z, CI+NH3) 246 (M++17), 228 (M+), 210, 194; “Anti” NMR (500 MHz, CDCl3) 7.60-7.50, 5.33, 4.64, 4.33, 1.33 δ; CMR (300 MHz, CDCl3) 167.9, 138.2, 128.7, 128.5, 126.7, 74.6, 62.9, 62.2 and 13.7 δ; “Syn” NMR (500 MHz, CDCl3) 7.60-7.50, 5.24, 4.58, 4.44 and 1.46 δ; CMR (300 MHz, CDCl3) 168.9, 138.8, 126.7, 126.5, 126.9, 75.2, 62.3, 59.2 and 13.8 δ. are added in portions (4.2 g×3) with vigorous stirring The reaction temperature is maintained at −5 to 0° After the addition the reaction mixture is stirred continuously at 0° for 5 hr with stirring The mixture is extracted with ethyl acetate (1 l) The organic phase is washed three times with water (100 ml) and saline (100 ml) dried over magnesium sulfate the solvent is removed under reduced pressure