2,2'-Bis(dicyclohexylphosphino)-1,1'-biphenyl → 1-{3-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenyl}-4-methyl-piperazin-2-one

HRID 1889978Notes

Reaction equation

HRID 1889978 reaction equation
Cl[C:2]1[N:20]=[C:5]2[C:6]([C:10]3[CH:15]=[CH:14][C:13]([S:16]([CH3:19])(=[O:18])=[O:17])=[CH:12][CH:11]=3)=[CH:7][CH:8]=[CH:9][N:4]2[N:3]=1.[NH2:21][C:22]1[CH:23]=[C:24]([N:28]2[CH2:33][CH2:32][N:31]([CH3:34])[CH2:30][C:29]2=[O:35])[CH:25]=[CH:26][CH:27]=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)CCCCC1>>[CH3:19][S:16]([C:13]1[CH:14]=[CH:15][C:10]([C:6]2[C:5]3[N:4]([N:3]=[C:2]([NH:21][C:22]4[CH:23]=[C:24]([N:28]5[CH2:33][CH2:32][N:31]([CH3:34])[CH2:30][C:29]5=[O:35])[CH:25]=[CH:26][CH:27]=4)[N:20]=3)[CH:9]=[CH:8][CH:7]=2)=[CH:11][CH:12]=1)(=[O:18])=[O:17]

Participants

4

Reactant 3

HCID 249469872,2'-Bis(dicyclohexylphosphino)-1,1'-biphenylHCID 579741721-(3-Aminophenyl)-4-methylpiperazin-2-oneHCID 674814372-Chloro-8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridine

Product 1

HCID 596123851-{3-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenyl}-4-methyl-piperazin-2-one

Procedure

204 a) An oven dried tube was charged with 1-iodo-3-nitro-benzene (2.60 g, 10.4 mmol), 4-methyl-piperazin-2-one (1.00 g, 8.76 mmol), copper(I) iodide (85.0 mg, 0.446 mmol), (1R,2R)—N,N′-dimethyl-cyclohexane-1,2-diamine (0.14 mL, 0.89 mmol), potassium phosphate (3.75 g, 17.7 mmol) and 1,4-dioxane (10 mL). The tube was carefully evacuated and backflushed with nitrogen three times then sealed. The mixture was heated at 90° C. for 24 hours then cooled to room temperature and diluted with dichloromethane (20 mL). The mixture was filtered through a plug of diatomaceous earth and the filtrate was evaporated. The residue was purified via chromatography using an ISCO automated purification apparatus (silica gel column 40 g and 0%→4% methanol:dichloromethane). 4-Methyl-1-(3-nitro-phenyl)-piperazin-2-one was isolated as a red-brown waxy solid (1.13 g, 55%). 1H NMR (400 MHz, CDCl3, δ, ppm): 8.20 (s, 1H), 8.13 (d, J=7.5 Hz, 1H), 7.73 (d, J=8.0 Hz, 1H), 7.57 (t, J=8.2 Hz, 1H), 3.79 (t, J=5.1 Hz, 2H), 3.31 (s, 2H), 2.83 (t, J=5.2 Hz, 2H), 2.42 (s, 3H). MS=236 (MH)+. 204 b) 1-(3-Amino-phenyl)-4-methyl-piperazin-2-one was prepared from 4-methyl-1-(3-nitro-phenyl)-piperazin-2-one (1.13 g, 4.80 mmol) in a manner analogous to Example 111a. Product isolated as an orange waxy solid (0.95 g, 96%). 1H NMR (400 MHz, CDCl3, δ, ppm): 7.17 (t, J=7.9 Hz, 1H), 6.66-6.57 (m, 3H), 3.71 (br s, 2H), 3.67 (t, J=4.7 Hz, 2H), 3.26 (s, 2H), 2.76 (t, J=4.7 Hz, 2H), 2.40 (s, 3H). MS=206 (MH)+. 204 c) 1-{3-[8-(4-Methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-2-ylamino]-phenyl}-4-methyl-piperazin-2-one was prepared from 2-chloro-8-(4-methanesulfonyl-phenyl)-[1,2,4]triazolo[1,5-a]pyridine (100.0 mg, 0.3249 mmol) and 1-(3-amino-phenyl)-4-methyl-piperazin-2-one (75.0 mg, 0.365 mmol) with 2,2′-bis-dicyclohexylphosphanyl-biphenyl (27.0 mg, 0.0494 mmol) as the ligand in a manner analogous to Example 2d. 1H NMR (400 MHz, (D3C)2SO, δ, ppm): 9.91 (s, 1H), 8.89 (d, J=6.6 Hz, 1H), 8.44 (d, J=8.2 Hz, 2H), 8.08 (d, J=8.0 Hz, 2H), 7.99 (d, J=7.3 Hz, 1H), 7.86 (s, 1H), 7.51 (d, J=7.9 Hz, 1H), 7.31 (t, J=7.9 Hz, 1H), 7.19 (t, J=7.0 Hz, 1H), 6.85 (d, J=7.7 Hz, 1H), 3.68-3.63 (m, 2H), 3.29 (s, 3H), 3.13 (s, 2H), 2.77-2.72 (m, 2H), 2.31 (s, 3H). MP=234-236° C. MS=477 (MH)+.

Sources & evidence

ORD record
ord-4815d2f4ab6945358ed9e687dd29ca49
Source dataset
uspto-grants-2013_08
Patent number
US08501936B2

Reaction notes

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