3-(dimethylcarbamoylimino)-1,1-dimethylurea

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:

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

Procedure: To a solution of spiro[furo[2,3-f][1,3]benzodioxole-7,3′-indol]-2′(1′H)-one (0.56 g, 1.99 mmol) and (5-chloro-1,3,4-thiadiazol-2-yl)methanol (0.30 g, 1.99 mmol) in anhydrous tetrahydrofuran (12.0 mL) was added tributylphosphine (0.60 g, 2.99 mmol) at 0° C. The reaction mixture was stirred for 15 min followed by the addition of N,N,N′,N′-tetramethylazodicarboxamide (0.51 g, 2.99 mmol). The reaction mixture was stirred at ambient temperature overnight, quenched with aqueous ammonium chloride (10.0 mL) and diluted with ethyl acetate (350 mL). The organic layer was washed with aqueous saturated sodium chloride (2×25.0 mL), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was subjected to column chromatography (ethyl acetate/hexane, 1/2) to give the title compound (0.20 g, 24%) as a yellowish solid: mp 194-197° C.; 1H NMR (300 MHz, DMSO-d6,) δ 7.30 (dt, 1H), 7.20-7.12 (m, 2H), 7.05 (dt, 1H), 6.67 (s, 1H), 6.28 (s, 1H), 5.90 (s, 2H), 5.43 (d, 1H), 5.34 (d, 1H), 4.78 (d, 1H), 4.67 (d, 1H); 13C NMR (75 MHz, DMSO-d6) δ 177.2, 168.3, 155.8, 155.4, 148.9, 142.2, 141.9, 132.2, 129.4, 124.2, 124.0, 120.1, 109.8, 103.7, 101.9, 93.8, 80.1, 67.5, 57.9, 25.6; MS (ES+) m/z 414.2 (M +1), 416.2 (M+1). The reaction mixture was stirred at ambient temperature overnight quenched with aqueous ammonium chloride (10.0 mL) diluted with ethyl acetate (350 mL) The organic layer was washed with aqueous saturated sodium chloride (2×25.0 mL) dried over anhydrous sodium sulfate filtered The filtrate was concentrated in vacuo to dryness

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

Procedure: To a solution of 200 mg (0.494 mmol) 2-[2-(4-chloro-2-methyl-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethanol in 5 ml tetrahydrofuran were added 83 mg (0.543 mmol) methyl 6-hydroxynicotinate (commercially available) and 120 mg (0.593 mmol) tri-n-butylphosphin. The reaction mixture was cooled down to 0° C. 102 mg (0.593 mmol) N,N,N′,N′-tetramethylazodicarboxamide were added. The reaction mixture was stirred for 18 hours at room temperature and then concentrated under vacuum. The residue was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30). Light yellow solid (29%). MS (Turbo Spray): m/z=540.2 [M+H]. concentrated under vacuum The residue was purified by silica gel chromatography eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30)

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

Procedure: The title compound was prepared in analogy to Example 4, intermediate, from 2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethanol (Example 1, intermediate c), 1-(4-hydroxy-phenoxy)-cyclopropanecarboxylic acid (CAS RN: 857903-44-7) and N,N,N′,N′-tetramethylazodicarboxamide. The compound was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30). Light yellow foam (31%). MS (Turbo Spray): m/z=581.2 [M+H]. The compound was purified by silica gel chromatography eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30)

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

Procedure: The title compound was prepared in analogy to Example 4, intermediate, from 2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethanol (Example 1, intermediate c), 1-(4-hydroxy-phenoxy)-cyclobutanecarboxylic acid ethyl ester (CAS RN: 879094-83-4), tri-n-butylphosphin and N,N,N′,N′-tetramethylazodicarboxamide. The compound was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30). Light yellow foam (45%). MS (Turbo Spray): m/z=609.3 [M+H]. The compound was purified by silica gel chromatography eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30)

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

Procedure: The title compound was prepared in analogy to Example 4, intermediate, from 2-[2-(4-chloro-phenyl)-5,6-difluoro-benzoimidazol-1-yl]-2-cyclohexyl-ethanol (Ex. 1, int. c), 2-(3-hydroxy-phenoxy)-2-methyl-propionic acid ethyl ester (CAS RN: 328919-24-0), tri-n-butylphosphin and N,N,N′,N′-tetramethylazodicarboxamide. The compound was purified by silica gel chromatography using a MPLC system (CombiFlash Companion, Isco Inc.) eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30). Light yellow solid (19%). MS (Turbo Spray): m/z=597.2 [M+H]. The compound was purified by silica gel chromatography eluting with a gradient of n-heptane:ethyl acetate (100:0 to 70:30)