chloro(chloromethoxy)methane

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

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-bromo-4-hydroxybenzaldehyde (5 g, 2.44 mmol) in acetone (100 mL) under nitrogen atmosphere was added potassium carbonate (50 6 g, 36.6 mmol). The slurry mixture was cooled to 0° C. and chloromethyl ether (9.25 mL, 12.2 mmol) was added dropwise. The ice bath was removed and the mixture was heated at 70° C. for 2.5 h. After cooling to room temperature, excess potassium carbonate was filtered off and the acetone evaporated under reduced pressure. The residue was dissolved in ethyl acetate (300 mL) and water (100 mL) was added. The organic layer was separated, washed with 0.5 N sodium hydroxide solution (100 mL×2) followed by brine and dried over sodium sulfate and concentrated to give a crude oil (6.69 g), which was purified by Flash Column Chromatography on 230-400 mesh silica gel (40-63 μm particle size) eluted with EtOAc/hexane: 2/3 to provide pure 3-bromo-4-methoxymethoxy-benzaldehyde, as an oil (4.46 g, 73.2%). To a solution of 3-bromo-4-methoxymethoxy-benzaldehyde (4.4 g, 17.9 mmol) and vinyltributyl tin (5.8 mL, 19.7 mmol) in toluene (130 mL) under nitrogen atmosphere was added an catalytic amount of tetrakis(triphenylphosphine) palladium (0.79 mg, 0.68 mmol). The resulting mixture was heated at 100° C. overnight, cooled to room temperature and a saturated potassium fluoride solution (30 mL) was added. The solution was stirred for 30 min then diluted with ethyl acetate, separated, and the aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate and evaporated under reduced pressure to provide crude yellow oil (4.6 g). The crude was purified by flash column chromatography to give pure 4-methoxymethoxy-3-vinyl-benzaldehyde as a yellow oil (1.95 g, 56.5%). To a solution of 4-methoxymethoxy-3-vinyl-benzaldehyde (1.8 g, 9.46 mmol) in THF (25 mL) under nitrogen was added borane dimethyl sulfide complex at 0° C. The solution was allowed to warm to room temperature and was stirred for 18 h. The reaction mixture was quenched at 0° C. with methanol (12 mL), hydrogen peroxide solution (8 mL) and 4 N sodium hydroxide solution (12 mL). The mixture was vigorously stirred at room temperature for 12 h and was diluted with ethyl acetate. The aqueous layer was extracted with ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate and evaporated under reduced pressure to provide crude oil (3.2 g). The crude was purified by flash column chromatography to give pure 2-(5-hydroxymethyl-2-methoxymethoxy-phenyl)-ethanol (1.19 g, 59.5%). The mixture of 2-(5-hydroxymethyl-2-methoxymethoxy-phenyl)-ethanol (0.78 g, 3.69 mmol) and magnesium dioxide (0.086 g, 0.99 mmol) in chloroform (12 mL) was heated at 80° C. for 3 h under nitrogen. The reaction mixture was cooled to room temperature and was diluted with chloroform and filtered through a Celite pad to give the desired 3-(2-hydroxy-ethyl)-4-methoxymethoxy-benzaldehyde (0.63 g, 81.3%), which was used without further purification. The ice bath was removed the mixture was heated at 70° C. for 2.5 h After cooling to room temperature excess potassium carbonate was filtered off the acetone evaporated under reduced pressure The residue was dissolved in ethyl acetate (300 mL) water (100 mL) was added The organic layer was separated washed with 0.5 N sodium hydroxide solution (100 mL×2) dried over sodium sulfate concentrated to give a crude oil (6.69 g), which was purified by Flash Column Chromatography on 230-400 mesh silica gel (40-63 μm particle size) eluted with EtOAc/hexane

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

Procedure: In a solution of 0.06 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methylamino-N-(2-pyridylmethyl) benzoic acid amide (Compound of the present invention No. 5-332) synthesized similarly to Synthetic Example 18 in 5 ml of dichloromethane, 0.03 g of chloromethylether was added, and stirred at the same temperature for 15 hours After the completion of the reaction, the solvent was distilled off under reduced pressure, and the residue was purified with silica gel column chromatography that was eluated with ethyl acetate-hexane (3:1) to obtain 0.04 g of the aimed product as colorless oily substance. After the completion of the reaction the solvent was distilled off under reduced pressure the residue was purified with silica gel column chromatography that

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

Procedure: A quantity of 206 grams of 1-nitro-2-propanol was chloromethylated with 60 grams paraformaldehyde and excess hydrogen chloride according to the procedure given in Example I. The crude chloromethylether resulting was reacted with 154 grams of thiolacetic acid and then 154 grams of pyridine and distilled in vacuo after workup as described in Example I to give 123 grams of 1-nitro-2-acetylthiomethyloxy propane; structure confirmed by spectral analysis. 154 grams of pyridine and distilled in vacuo after workup

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

Procedure: A quantity of 206 grams of 1-nitro-2-propanol was chloromethylated with 60 grams paraformaldehyde and excess hydrogen chloride according to the procedure given in Example I. The crude chloromethylether resulting was reacted with 154 grams of thiolacetic acid and then 154 grams of pyridine and distilled in vacuo after workup as described in Example I to give 123 grams of 1-nitro-2-acetylthiomethyloxy propane; structure confirmed by spectral analysis. 154 grams of pyridine and distilled in vacuo after workup

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

Procedure: 100 ml of a solution of 7.0 g of ethyl 10H-pyrazino[2,3-b][1,4]benzothiazine-7-carboxylate in N,N-dimethylformamide was ice-cooled in a nitrogen atmosphere and 1.3 g of sodium hydride (60% oily) was added thereto. Then the resulting mixture was brought back to room temperature and stirred for 1 hour. Next, it was ice-cooled again and 2.5 ml of chloromethyl ether was dropped thereinto. After the completion of the reaction, the reaction mixture was distributed into water and ethyl acetate. The organic layer was extracted, washed with water and dried over anhydrous sodium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography (eluted with ethyl acetate/hexane) to thereby give 5.0 g of ethyl 10-(methoxymethyl)-10H-pyrazino[2,3-b][1,4]benzothiazine-7-carboxylate as pale yellow crystals. was added was brought back to room temperature cooled again After the completion of the reaction The organic layer was extracted washed with water dried over anhydrous sodium sulfate After distilling off the solvent under reduced pressure the residue was purified by silica gel column chromatography (eluted with ethyl acetate/hexane)

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

Procedure: In a solution of 0.06 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazole-3-yl]-2-methylamino-N-(2-pyridylmethyl)benzoic acid amide (Compound of the present invention No. 5-332) synthesized similarly to Synthetic Example 18 in 5 ml of dichloromethane, 0.03 g of chloromethylether was added, and stirred at the same temperature for 15 hours After the completion of the reaction, the solvent was distilled off under reduced pressure, and the residue was purified with silica gel column chromatography that was eluated with ethyl acetate-hexane (3:1) to obtain 0.04 g of the aimed product as colorless oily substance. After the completion of the reaction the solvent was distilled off under reduced pressure the residue was purified with silica gel column chromatography that

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: At 0° C., to a stirred solution of 4-(5-bromo-2-chlorobenzyl)phenol (6.85 g, 23 mmol) in dimethylformamide (100 mL) was added portionswise sodium hydride (60% in mineral oil, 1.01 g, 25.3 mmol), the mixture was stirred at 0° C. for further 30 minutes. Chloromethyl ether (2.02 g, 25.3 mmol) was slowly added in drops and when the addition finished, the mixture was stirred at room temperature for further 3 hours. Water (150 mL) was added, the mixture was extracted for two times with ethyl acetate, the combined organic phases were washed with saturated brine for one time and dried over anhydrous sodium sulfate. The solvent was evaporated under vacuum. The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20:1) to afford the target compound. the addition the mixture was stirred at room temperature for further 3 hours the mixture was extracted for two times with ethyl acetate the combined organic phases were washed with saturated brine for one time dried over anhydrous sodium sulfate The solvent was evaporated under vacuum The residue was purified by silica gel column chromatography (petroleum ether/ethyl acetate, 20:1) to afford the target compound

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

Procedure: 2-Thiophenecarboxylic acid is treated in a solution of chloroform with chloromethyl ether in the presence of 0.9 to 2.2 equivalents of aluminum chloride to give 5-chloromethyl-2-thienylcarboxylic acid. Treatment of the obtained acid with excess thionyl chloride at room temperature for about 16 hours yields the acid chloride which is reacted with diazomethane to give the corresponding diazoketone. A methanol solution of the diazoketone is irradiated under nitrogen for about one hour with a high pressure mercury lamp using a Quarz filter. The methyl 5-chloromethyl-2-thienylacetate is obtained upon work up and column chromatography on silica gel. The acetate is hydrolyzed by treatment of a 1:1 mixture of acetic acid and concentrated hydrochloric acid at room temperature overnight to give 5-chloromethyl-2-thienylacetic acid.

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

Procedure: 2-Thiophenecarboxylic acid is treated in a solution of chloroform with chloromethyl ether in the presence of 0.9 to 2.2 equivalents of aluminum chloride to give 5-chloromethyl-2-thienylcarboxylic acid. Treatment of the obtained acid with excess thionyl chloride at room temperature for about 16 hours yields the acid chloride which is reacted with diazomethane to give the corresponding diazoketone. A methanol solution of the diazoketone is irradiated under nitrogen for about one hour with a high pressure mercury lamp using a Quarz filter. The methyl 5-chloromethyl-2-thienylacetate is obtained upon work up and column chromatography on silica gel. The acetate is hydrolyzed by treatment of a 1:1 mixture of acetic acid and concentrated hydrochloric acid at room temperature overnight to give 5-chloromethyl-2-thienylacetic acid.

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

Procedure: 5-Fluoro-2-nitrophenol (10 g, 63 mmol, 99%) was dissolved in anhydrous DMF (100 mL) in an oven-dried flask. The solution was stirred under an atmosphere of nitrogen and cooled in an ice-water bath. Sodium hydride (3.0 g, 75 mmol) was added with stirring, after which chloro methylether (5.3 g, 66 mmol) was added dropwise. The resulting mixture was aged at room temperature for 1 h. The reaction was quenched with MeOH, diluted with ether and washed with water and brine. The ether layer was dried over anhydrous Na2SO4 and concentrated in vacuo. Purification of the product by silica gel chromatography (hexanes/EtOAc=1/7) gave the title compound in 88% yield. 1H NMR (500 MHz, CDCl3) δ 3.53 (s, 3H), 5.30 (d, J=2.0 Hz, 2H), 6.78 (dd, J=7.3, 9.1 Hz, 1H), 7.06 (dt, J=2.3, 10.4 Hz, 1H), 7.91 (dd, J=6.0, 9.0 Hz, 1H). 13C NMR (126 MHz, CDCl3) δ 57.0, 95.6, 105.0 (d, J=26.3 Hz), 108.8 (d, J=23.0 Hz), 127.8 (d, J=10.7 Hz), 152.8 (d, J=11.5 Hz), 165.5 (d, J=255.9 Hz). HRMS (FAB) calcd for C8H8FNNaO4 (M+Na+) 224.0330. found 224.0328. cooled in an ice-water bath with stirring The reaction was quenched with MeOH diluted with ether washed with water and brine The ether layer was dried over anhydrous Na2SO4 concentrated in vacuo Purification of the product by silica gel chromatography (hexanes/EtOAc=1/7)

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

Procedure: 5-Fluoro-2-nitrophenol (10 g, 63 mmol, 99%) was dissolved in anhydrous DMF (100 mL) in an oven-dried flask. The solution was stirred under an atmosphere of nitrogen and cooled in an ice-water bath. Sodium hydride (3.0 g, 75 mmol) was added with stirring, after which chloro methylether (5.3 g, 66 mmol) was added dropwise. The resulting mixture was aged at room temperature for 1 h. The reaction was quenched with MeOH, diluted with ether and washed with water and brine. The ether layer was dried over anhydrous Na2SO4 and concentrated in vacuo. Purification of the product by silica gel chromatography (hexanes/EtOAc=1/7) gave the title compound in 88% yield. 1H NMR (500 MHz, CDCl3) δ 3.53 (s, 3H), 5.30 (d, J=2.0 Hz, 2H), 6.78 (dd, J=7.3, 9.1 Hz, 1H), 7.06 (dt, J=2.3, 10.4 Hz, 1H), 7.91 (dd, J=6.0, 9.0 Hz, 1H). 13C NMR (126 MHz, CDCl3) δ 57.0, 95.6, 105.0 (d, J=26.3 Hz), 108.8 (d, J=23.0 Hz), 127.8 (d, J=10.7 Hz), 152.8 (d, J=11.5 Hz), 165.5 (d, J=255.9 Hz). HRMS (FAB) calcd for C8H8FNNaO4 (M+Na+) 224.0330. found 224.0328. cooled in an ice-water bath with stirring The reaction was quenched with MeOH diluted with ether washed with water and brine The ether layer was dried over anhydrous Na2SO4 concentrated in vacuo Purification of the product by silica gel chromatography (hexanes/EtOAc=1/7)