Water → 4-(4-Methylamino-3-nitro-phenoxy)-pyridine-2-carbonitrile

HRID 15089Notes

Reaction equation

Cl[C:2]1[CH:7]=[CH:6][N:5]=[C:4]([C:8]#[N:9])[CH:3]=1.[CH3:10][NH:11][C:12]1[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][C:13]=1[N+:19]([O-:21])=[O:20].C([O-])([O-])=O.[K+].[K+].O>CS(C)=O>[CH3:10][NH:11][C:12]1[CH:17]=[CH:16][C:15]([O:18][C:2]2[CH:7]=[CH:6][N:5]=[C:4]([C:8]#[N:9])[CH:3]=2)=[CH:14][C:13]=1[N+:19]([O-:21])=[O:20]

Participants

Conditions

Temperature: 60 °C

Procedure

A mixture of 4-chloro-2-cyano-pyridine (6.9 g, 0.05 moles), 4-methylamino-3-nitrophenol (8.4 g, 0.05 moles), and K2CO3 (10.4 g, 0.075 moles) in DMSO (80 mL) was heated to 60° C. After 11.5 h, HPLC analysis indicated complete conversion of both starting materials. After cooling to 20° C., water (240 mL) was added to the reaction mixture. The temperature rose to 40° C. before decreasing to ambient temperature. The solid was collected by filtration and washed with water (2×40 mL). The solid was then slurried in heptane (40 mL). The solid was collected and washed with heptane (40 mL). The crude product was dried in a vacuum oven at 50° C. for 16 h to afford 10.33 g (76%) of the title compound: 1H NMR (400 MHz, DMSO-d6) δ 8.5 (m, 1 H), 8.2 (m, 1 H), 7.9 (m, 1 H), 7.7 (m, 1 H), 7.5 (m, 1 H), 7.2 (m, 1 H), 7.1 (m, 1 H), 3.0 (s, 3 H); 13C NMR (100 MHz, DMSO-d6) 165.1, 152.9, 144.4, 140.6, 134.1, 130.4, 130.1, 117.9, 117.1, 117.0, 116.5, 114.9, 29.8; APCI MS [M+H]+=271; HPLC >99% (LCAP).

Workup

temperatureAfter cooling to 20° C.
customrose to 40° C.
custombefore decreasing to ambient temperature
filtrationThe solid was collected by filtration
washwashed with water (2×40 mL)
customThe solid was collected
washwashed with heptane (40 mL)
dry with materialThe crude product was dried in a vacuum oven at 50° C. for 16 h

Sources & evidence

ORD record: ord-55612debcf7646ed8b4698e54a438dac
Source dataset: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07732465B2

Reaction notes

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