2-(Bromomethyl)-1,3-difluorobenzene → HCID 492664, compound

HRID 841542Notes

Reaction equation

HRID 841542 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([F:8])[C:3]=1[C:9]1[NH:10][C:11]2[C:17]([CH3:18])=[CH:16][C:15]([CH3:19])=[CH:14][C:12]=2[N:13]=1.[F:20][C:21]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:22]=1[CH2:28]Br>>[F:20][C:21]1[CH:26]=[CH:25][CH:24]=[C:23]([F:27])[C:22]=1[CH2:28][N:13]1[C:12]2[CH:14]=[C:15]([CH3:19])[CH:16]=[C:17]([CH3:18])[C:11]=2[N:10]=[C:9]1[C:3]1[C:4]([F:8])=[CH:5][CH:6]=[CH:7][C:2]=1[F:1]

Participants

3

Reactant 2

HCID 5814352-(Bromomethyl)-1,3-difluorobenzeneHCID 178424026HCID 178424026, compound

Product 1

HCID 492664HCID 492664, compoundYield 91.2%

Procedure

To 2-(2,6-difluorophenyl)-4,6-dimethylbenzimidazole (Example 94) (0.50 g, 1.94 mmol) was added 2,6-difluoro-α-bromotoluene (0.52 g, 2.51 mmol, 130 M%). Flash chromatography of the crude product eluting with 2% methanol/CH2Cl2, and recrystallization from hexane gave white crystals of 1-(2,6-difluorobenzyl)-2-(2,6-difluorophenyl)-4,6-dimethylbenzimidazole (0.68 g, 1.77 mmol, 91% yield). 1H NMR (200 MHz, CD2Cl2): δ7.51 (cm, 1H, H4), 7.23 (m, 1H, H4″), 7.11 (m, 1H, H5), 7.05 (cm, 2H, H3′,5′), 6.93 (m, 1H, H7), 6.80 (cm, 2H, H3″,5″), 5.29 (s, 2H, CH2PhF2), 2.58 (s, 3H, CH3), 2.44 (s, 3H, CH3).

Workup

  1. washFlash chromatography of the crude product eluting with 2% methanol/CH2Cl2, and recrystallization from hexane

Sources & evidence

ORD record
ord-496a5d5d6a6c4bb1ad16b27c38a44065
Source dataset
uspto-grants-2002_04
Patent number
US06369235B1

Reaction notes

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