1-isothiocyanato-2-propan-2-ylbenzene

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A mixture of 2-isopropylphenyl-isothiocyanate (17.7 g), N-methyl aminooxy acetic acid hydrochloride (14.2 g), triethylamine (20 g) and chloroform (300 mL) was stirred at ambient temperature for two hour, then evaporated to dryness. The residue was dissolved in ethyl acetate (400 mL) and washed with 2N HCl (2×200 mL) then with water (100 mL). The organic phase was dried over anhydrous magnesium sulfate and evaporated to dryness affording (21 g) of [[[[(2-isopropylphenyl)amino]thioxomethyl]methylamino]oxy]acetic acid as an oil. 1H-NMR (DMSO-d6; 300 Mhz) δ13.0 (br s, 1H), 10.15 (s, 1H), 7.42-7.05 (m, 4H), 4.63 (s, 2H), 3.58 (s, 3H), 3.08 (m, 1H), and 1.15 ppm (d, 6H). The acid (20 g) was dissolved in benzene (200 mL). Phosphorus pentachloride (14.7 g) was added in portions. The mixture was heated at reflux for one half hour then evaporated to dryness. The residue was dissolved in ethyl acetate (700 mL) and washed with sodium bicarbonate saturated solution (3×400 mL) then with water (300 mL). The organic phase was dried over anhydrous magnesium sulfate and evaporated to dryness. The residue was chromatographed on silica gel (10-50% methylene chloride in hexane). The title compound (12.8 g) was obtained as a solid, m.p. 98-101° C. Mass spectrum (El, M.+) m/z 264. 1H-NMR (CDCl3; 400 MHz) δ7.37 (m, 2H), 7.22 (t, 1H), 7.06 (d, 1H), 5.12 (q, 2H), 3.69 (s, 3H), 2.69 (m, 1H), 1.15 (d, 3H), and 1.04 ppm (d, 3H). evaporated to dryness The residue was dissolved in ethyl acetate (400 mL) washed with 2N HCl (2×200 mL) The organic phase was dried over anhydrous magnesium sulfate evaporated to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: 1-Isopropyl-2-isothiocyanatobenzene (5 mmol) and methyl 3,4-diaminobenzoate (5 mmol) were reacted, following general procedure B, to yield 2-(2-Isopropylphenylamino)-1H-benzimidazole-5-carboxylic acid methyl ester, which was purified by silica gel chromatography using DCM/ethyl acetate as eluent.

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of (2-isopropylphenyl)isothiocyanate (2.00 g) in diethylether (20 ml) was added 2-aminoethanol (0.69 g). The mixture was stirred at room temperature for 1 hour and concentrated under reduced pressure. To the obtained oil was added concentrated hydrochloric acid (5 ml). The mixture was refluxed for 3 hours. The reaction mixture was cooled to room temperature and poured into an aqueous solution of 20% sodium hydroxide (25 ml). The mixture was extracted with dichloromethane (60 ml), dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate) to give 2-(2-isopropylphenyl)imino-1,3-thiazolidine (1.80 g, yield: 73%) as a white crystal. M.p. 76–77° C. concentrated under reduced pressure To the obtained oil was added concentrated hydrochloric acid (5 ml) The mixture was refluxed for 3 hours The reaction mixture was cooled to room temperature poured into an aqueous solution of 20% sodium hydroxide (25 ml) The mixture was extracted with dichloromethane (60 ml) dried over anhydrous magnesium sulfate concentrated under reduced pressure The obtained residue was purified by silica gel column chromatography (n-hexane/ethyl acetate)

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared by the procedure described in Example 18 using 10.0 g of 2-isopropylphenyl-isothiocyanate, 11.9 g of N-isopropyl glycine, 12.0 g of triethyl amine, and 200 mL of chloroform. Crystallization from ethanol afforded the title compound (6.8 g) as a light pink solid, m.p. 112°-114° C. Anal. Calcd. for. C15H20N2OS: C, 65.18; H, 7.29; N, 10.13. Found: C, 65.51; H, 7.25; N, 10.32. Mass spectrum (EI, M.+) m/z 276. The title compound was prepared by the procedure Crystallization from ethanol

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared by the procedure described in Example 9 using 15.42 g of 2-isopropylphenyl-isothiocyanate, 16.05 g of N-ethyl glycine, 12 g of triethyl amine, and 200 mL of chloroform. Purification was achieved by flash chromatography on silica gel (5-20% ethyl acetate in hexane). Crystallization from ethanol afforded the title compound (9.8 g) as a white solid, m.p. 125°-127° C. Anal. Calcd. for. C14H18N2OS: C, 64.09; H, 6.91; N, 10.68. Found: C, 64.19 H, 6.93; N, 10.71. Mass spectrum (EI, M.+) m/z 262. The title compound was prepared by the procedure Purification Crystallization from ethanol

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared by the procedure described in Example 1 using 14.2 g of 2-isopropylphenyl-isothiocyanate, 12.29 g of sarcosine ethyl ester hydrochloride, 16.0 g of triethyl amine, and 200 mL of chloroform. Crystallization from diethyl ether afforded the title compound (15.9 g) as a peach solid, m.p. 129°-131° C. Anal. Calcd. for C13H16N2OS: C, 62.87; H, 6.49; N, 11.28. Found: C, 62.89; H, 6.38; N, 11.28. Mass spectrum (EI, M.+) m/z 248. The title compound was prepared by the procedure Crystallization from diethyl ether

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared by the procedure described in Example 45 using 10.0 g of 2-isopropylphenyl-isothiocyanate, 11.9 g of N-isopropyl glycine, 12.0 g of triethyl amine, and 200 mL of chloroform. Crystallization from ethanol afforded the title compound (6.8 g) as a light pink solid, m.p. 112°-114° C. Anal. Calcd. for. C15H2O N2O S: C, 65.18; H, 7.29; N, 10.13, Found: C, 65.51; H, 7.25; N, 10.32. Mass spectrum (EI, M.+) m/z 276. The title compound was prepared by the procedure Crystallization from ethanol

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: The title compound was prepared by the procedure described in Example 16 using 15.42 g of 2-isopropylphenyl-isothiocyanate, 16.05 g of N-ethyl glycine, 12 g of triethyl amine, and 200 mL of chloroform. Purification was achieved by flash chromatography on silica gel (5-20 % ethyl acetate in hexane) Crystallization from ethanol afforded the title compound (9.8 g) as a white solid, m.p. 125°-127° C. Anal. Calcd. for. C14H18N2O S: C, 64.09; H, 6.91; N, 10.68. Found: C, 64.19 H, 6.93; N, 10.71. Mass spectrum (EI, M.+) m/z 262. The title compound was prepared by the procedure Purification was achieved by flash chromatography on silica gel (5-20 % ethyl acetate in hexane) Crystallization from ethanol