Nitrogen → N-(2',5'-difluoro-5-nitrobiphenyl-3-yl)acetamide

HRID 64126

Reaction equation

HRID 64126 reaction equation
Br[C:2]1[CH:3]=[C:4]([NH:11][C:12](=[O:14])[CH3:13])[CH:5]=[C:6]([N+:8]([O-:10])=[O:9])[CH:7]=1.N#N.[F:17][C:18]1[CH:23]=[CH:22][C:21]([F:24])=[CH:20][C:19]=1B(O)O.C(=O)([O-])[O-].[Na+].[Na+]>COCCOC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[F:17][C:18]1[CH:23]=[CH:22][C:21]([F:24])=[CH:20][C:19]=1[C:2]1[CH:7]=[C:6]([N+:8]([O-:10])=[O:9])[CH:5]=[C:4]([NH:11][C:12](=[O:14])[CH3:13])[CH:3]=1

Participants

7

Reactant 4

HCID 947NitrogenHCID 10340Sodium CarbonateHCID 2734335(2,5-Difluorophenyl)boronic acidHCID 10658908N-(3-bromo-5-nitrophenyl)acetamide

Product 1

HCID 117777627N-(2',5'-difluoro-5-nitrobiphenyl-3-yl)acetamideYield 67%

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 80711,2-DimethoxyethaneSolvent

Procedure

A solution of N-(3-bromo-5-nitrophenyl)acetamide of Example 1(c) (0.8 g, 3.07 mmol) in 1,2-dimethoxyethane (15 ml) was degassed by N2 bubbling for 5 min. 2,5-Difluorophenylboronic acid (0.58 g, 3.69 mmol, 1.2 eq.) was added and the mixture was degassed for another 5 min. Pd(dppf)Cl2 (0.5 g, 0.615 mmol, 0.2 eq.) and aqueous sodium carbonate (0.98 g, 9.23 mmol, 3.0 eq.) were added and the procedure of Example 1(d) was followed. The crude residue of the product was purified by column chromatography (60-120 silica gel, 25% ethyl acetate in hexane) to give the product in 67% yield (0.6 g). 1H NMR (300 MHz, DMSO-d6): δ 10.56 (s, 1H), 8.65 (t, 1H), 8.14 (s, 1H), 8.06 (s, 1H), 7.56-7.52 (m, 1H), 7.47-7.37 (m, 2H), 2.12 (s, 3H).

Workup

  1. customthe mixture was degassed for another 5 min
  2. customThe crude residue of the product was purified by column chromatography (60-120 silica gel, 25% ethyl acetate in hexane)
  3. customto give the product in 67% yield (0.6 g)

Sources & evidence

ORD record
ord-212d617d48bb4a4989bcc60b5c002bb1
Source dataset
uspto-grants-2016_09
Patent number
US09447091B2

Linked notes

Loading…