N-phenylformamide

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

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

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

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

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: To a mixture of phenylformamide (49.6 g, 410 mmol), 1-bromo-3-chloropropane (75.4 g, 490 mmol) in acetone (400 mL) was added CsCO3 (156.4 g, 480 mmol) and the resulting mixture was stirred at reflux temperature for 14 hours. The reaction mixture was filtered and the filtrate was concentrated under reduced pressure. Ethyl acetate (400 mL) and water (150 mL) were added to the residue and the organic layer was washed with brine (150 mL), dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane-ethyl acetate, 1/0 to 10/3, v/v) to give 3-chloropropyl(phenyl)formamide (69.1 g, 350 mmol) as pale yellow oil. Yield: 85%. To a solution of this pale yellow oil (36.2 g, 180 mmol) in 2-propanol (140 mL) was added conc. HCl (25 mL) and the mixture was stirred at 70° C. for 3 hours. The reaction mixture was cooled to r.t. and diisopropyl ether (140 mL) was added. The resulting mixture was allowed to stand at r.t. for 12 hours, that led precipitation of crystals. The crystals were collected by filtration and washed with diisopropyl ether (10 mL×2) to give N-(3-chloropropyl)aniline hydrochloride (13.7 g, 57 mmol) as colorless needles. The combined filtrates were concentrated under reduced pressure and recrystallized from diisopropyl ether-2-propanol (1/2, v/v) to give N-(3-chloropropyl)aniline hydrochloride (19.5 g, 81 mmol). Yield: 76%. From N-(3-chloropropyl)aniline hydrochloride (5.0 g, 21 mmol), using a similar procedure to that described for reference example 57, the title compound (7.0 g, 19 mmol) was obtained as colorless crystals. Yield: 90%. at reflux temperature for 14 hours The reaction mixture was filtered the filtrate was concentrated under reduced pressure Ethyl acetate (400 mL) and water (150 mL) were added to the residue the organic layer was washed with brine (150 mL) dried over MgSO4 concentrated under reduced pressure The residue was purified by silica gel column chromatography (n-hexane-ethyl acetate, 1/0 to 10/3

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

Procedure: 2-Methyl-4-nitroaniline was converted to the 2-methyl-4-nitroformanilide according to Method A3a, Step 1. The formanilide was converted to 2-methyl-4-nitrophenyl isocyanide dichloride according to Method A3a, Step 2. 4-Aminotetrahydro-2H-pyran4-carboxylic acid was converted to the methyl ester according to Method B1b, Step 1. Methyl 4-aminotetrahydro-2H-pyran-4-carboxylate was reduced to 4-amino-4-(hydroxymethyl)tetrahydro-2H-pyran according to Method B1b, Step 2. The 2-hydroxyethylamine was reacted with isobutyraldehyde according to Method B4c, Step 1 to afford 2-isopropyl-1-aza-3,8-dioxaspiro[4.5]decane. The oxazolidine was reduced to 4-isobutylamino-4-(hydroxymethyl)tetrahydro-2H-pyran. The substituted 2-hydroxyethylamine was converted to 4-isobutylamino-4-(acetylthiomethyl)tetrahydro-2H-pyran according to Method C6c, Step 1. The thioacetate was saponified according to Method C6c, Step 2 to give 4-isobutylamino-4-(thiomethyl)tetrahydro-2H-pyran. The 2-thioethylamine was reacted with 2-methyl-4-nitrophenyl isocyanide dichloride to afford 2-(2-methyl-4-nitrophenylimino-1-isobutyl-1-aza-8-oxa-3-thiaspiro[4.5]decane.

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

Procedure: 2-Methyl-4-nitroaniline was converted to the 2-methyl-4-nitroformanilide according to Method A3a, Step 1. The formanilide was converted to 2-methyl-4-nitrophenyl isocyanide dichloride according to Method A3a, Step 2. 4-Aminotetrahydro-2H-pyran4-carboxylic acid was converted to the methyl ester according to Method B1b, Step 1. Methyl 4-aminotetrahydro-2H-pyran-4-carboxylate was reduced to 4-amino-4-(hydroxymethyl)tetrahydro-2H-pyran according to Method B1b, Step 2. The 2-hydroxyethylamine was reacted with isobutyraldehyde according to Method B4c, Step 1 to afford 2-isopropyl-1-aza-3,8-dioxaspiro[4.5]decane. The oxazolidine was reduced to 4-isobutylamino-4-(hydroxymethyl)tetrahydro-2H-pyran. The substituted 2-hydroxyethylamine was converted to 4-isobutylamino-4-(acetylthiomethyl)tetrahydro-2H-pyran according to Method C6c, Step 1. The thioacetate was saponified according to Method C6c, Step 2 to give 4-isobutylamino-4-(thiomethyl)tetrahydro-2H-pyran. The 2-thioethylamine was reacted with 2-methyl-4-nitrophenyl isocyanide dichloride to afford 2-(2-methyl-4-nitrophenylimino-1-isobutyl-1-aza-8-oxa-3-thiaspiro[4.5]decane.

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

Procedure: 2-Methyl-4-nitroaniline was converted to the 2-methyl-4-nitroformanilide according to Method A3a, Step 1. The formanilide was converted to 2-methyl-4-nitrophenyl isocyanide dichloride according to Method A3a, Step 2. 3-Aminotetrahydro-2H-pyran-3-carboxylic acid was converted to the methyl ester according to Method B1b, Step 1. Methyl 3-aminotetrahydro-2H-pyran-3-carboxylate was reduced to 3-amino-3-(hydroxymethyl)tetrahydro-2H-pyran according to Method B1b, Step 2. The 2-hydroxyethylamine was reacted with isobutyraldehyde according to Method B4c, Step 1 to afford 2-isopropyl-1-aza-3,7-dioxaspiro[4.5]decane. The oxazolidine was reduced to 3-isobutylamino-3-(hydroxymethyl)tetrahydro-2H-pyran. The substituted 2-hydroxyethylamine was converted to 3-isobutylamino-3-(acetylthiomethyl)tetrahydro-2H-pyran according to Method C6c, Step 1. The thioacetate was saponified according to Method C6c, Step 2 to give 3-isobutylamino-3-(thiomethyl)tetrahydro-2H-pyran. The 2-thioethylamine was reacted with 2-methyl-4-nitrophenyl isocyanide dichloride to afford 2-(2-methyl-4-nitrophenylimino-1-isobutyl-1-aza-7-oxa-3-thiaspiro[4.5]decane.

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

Procedure: 2-Methyl-4-nitroaniline was converted to the 2-methyl-4-nitroformanilide according to Method A3a, Step 1. The formanilide was converted to 2-methyl-4-nitrophenyl isocyanide dichloride according to Method A3a, Step 2. 3-Aminotetrahydro-2H-pyran-3-carboxylic acid was converted to the methyl ester according to Method B1b, Step 1. Methyl 3-aminotetrahydro-2H-pyran-3-carboxylate was reduced to 3-amino-3-(hydroxymethyl)tetrahydro-2H-pyran according to Method B1b, Step 2. The 2-hydroxyethylamine was reacted with isobutyraldehyde according to Method B4c, Step 1 to afford 2-isopropyl-1-aza-3,7-dioxaspiro[4.5]decane. The oxazolidine was reduced to 3-isobutylamino-3-(hydroxymethyl)tetrahydro-2H-pyran. The substituted 2-hydroxyethylamine was converted to 3-isobutylamino-3-(acetylthiomethyl)tetrahydro-2H-pyran according to Method C6c, Step 1. The thioacetate was saponified according to Method C6c, Step 2 to give 3-isobutylamino-3-(thiomethyl)tetrahydro-2H-pyran. The 2-thioethylamine was reacted with 2-methyl-4-nitrophenyl isocyanide dichloride to afford 2-(2-methyl-4-nitrophenylimino-1-isobutyl-1-aza-7-oxa-3-thiaspiro[4.5]decane.

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

Procedure: 2,3-Dichloro-4-methylaniline was converted to the 2,3-dichloro-4-methylformanilide according to Method A3a, Step 1. The formanilide was converted to 2,3-dichloro-4-methylphenyl isocyanide dichloride according to Method A3a, Step 2. 1-Hydroxymethylcyclopentanamine HCl salt was synthesized according to Method B1c. The 2-hydroxyethylamine was converted to 13-aza-6-oxadispiro[4.2.4.1]tridecane according to Method B4d, Step 1. The oxazolidine was reductively opened according to Method B4d, Step 2 to give 1-(cyclopentylamino)-1-(hydroxymethyl)cyclopentane. The substituted 2-hydroxyethylamine was converted to 1-(cyclopentylamino)-1-(thioacetylmethyl)cyclopentane according to Method C6c, Step 1. The thioacetate was hydrolyzed according to Method C6c, Step 2 to give 1-(cyclopentylamino)-1-(thiomethyl)cyclopentane. The 2-thioethylamine was reacted with 2,3-dichloro-4-methylphenyl isocyanide dichloride according to Method C6c to afford 2-(2,3-dichloro-4-methylphenylimino)-1-cyclopentyl-3-thia-1-azaspiro[4.4]nonane.