Phenylboronic Acid → 4-bromo-1-(2,2-dimethylpropyl)-5-phenoxy-1H-benzotriazole

HRID 872295Notes

Reaction equation

HRID 872295 reaction equation
[Br:1][C:2]1[C:10]2[N:9]=[N:8][N:7]([CH2:11][C:12]([CH3:15])([CH3:14])[CH3:13])[C:6]=2[CH:5]=[CH:4][C:3]=1[OH:16].[C:17]1(B(O)O)[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>C(Cl)Cl.C([O-])(=O)C.[Cu+2].C([O-])(=O)C>[Br:1][C:2]1[C:10]2[N:9]=[N:8][N:7]([CH2:11][C:12]([CH3:13])([CH3:15])[CH3:14])[C:6]=2[CH:5]=[CH:4][C:3]=1[O:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1

Participants

5

Reactant 2

HCID 66827Phenylboronic AcidHCID 574249954-bromo-1-(2,2-dimethylpropyl)-1H-1,2,3-benzotriazol-5-ol

Product 1

HCID 679549744-bromo-1-(2,2-dimethylpropyl)-5-phenoxy-1H-benzotriazole

Reagents, catalysts & solvents 2

HCID 8895Cupric acetateCatalystHCID 6344DichloromethaneSolvent

Procedure

4-Bromo-1-(2,2-dimethylpropyl)-1H-1,2,3-benzotriazol-5-ol (1-6) (100 mg, 0.352 mmol, 1.0 equiv.), copper(II) acetate (63.9 mg, 0.352 mmol, 1.0 equiv.), phenylboronic acid (86 mg, 0.704 mmol, 2.0 equiv.) and freshly milled 4 Å molecular sieves were dried in vacuo and then suspended in anhydrous CH2Cl2 (3.5 mL) and TEA (245 μl, 1.760 mmol, 5.0 equiv.). The mixture was stirred ambient temperature for 18 hours, after which the mixture was filtered. The filtrate was concentrated in vacuo and the residue was purified via reverse phase HPLC (water/acetonitrile gradient containing 0.1% TFA) to provide 422. 1H NMR (CDCl3) δ 7.42 (1H, d, J=8.87 Hz), 7.36-7.30 (2H, m), 7.21 (1H, d, J=8.87 Hz), 7.12-7.07 (1H, m), 6.95 (2H, dd, J=7.97, 1.44 Hz), 4.40 (2H, s), 1.06 (9H, s) ppm. LRMS m/z (M+H) 360.0 and 362.0 (intensity ratio ˜1:1) found, 360.1 and 362.1 required.

Workup

  1. filtrationafter which the mixture was filtered
  2. concentrationThe filtrate was concentrated in vacuo
  3. customthe residue was purified via reverse phase HPLC (water/acetonitrile gradient containing 0.1% TFA)

Sources & evidence

ORD record
ord-4b7d9bfc7c92402da28a606ccba46ff3
Source dataset
uspto-grants-2015_03
Patent number
US08975286B2

Reaction notes

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