Octabenzone → 2-(Benzotriazol-2-yl)-4-methyl-6-(2-hydroxy-3-benzoyl-6-n-octyloxybenzyl)phenol

HRID 1756468Notes

Reaction equation

HRID 1756468 reaction equation
[OH:1][C:2]1[C:7]([CH2:8]N(CC)CC)=[CH:6][C:5]([CH3:14])=[CH:4][C:3]=1[N:15]1[N:19]=[C:18]2[CH:20]=[CH:21][CH:22]=[CH:23][C:17]2=[N:16]1.[OH:24][C:25]1[CH:38]=[C:37]([O:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH2:45][CH2:46][CH3:47])[CH:36]=[CH:35][C:26]=1[C:27]([C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:28].C[O-].[Na+]>>[N:16]1[N:15]([C:3]2[CH:4]=[C:5]([CH3:14])[CH:6]=[C:7]([CH2:8][C:38]3[C:37]([O:39][CH2:40][CH2:41][CH2:42][CH2:43][CH2:44][CH2:45][CH2:46][CH3:47])=[CH:36][CH:35]=[C:26]([C:27](=[O:28])[C:29]4[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=4)[C:25]=3[OH:24])[C:2]=2[OH:1])[N:19]=[C:18]2[CH:20]=[CH:21][CH:22]=[CH:23][C:17]=12

Participants

4

Reactant 3

HCID 15797OctabenzoneHCID 10942334Sodium MethoxideHCID 159190222-(2-Hydroxy-3-diethylaminomethyl-5-methylphenyl)-2H-benzotriazole

Product 1

HCID 199172702-(Benzotriazol-2-yl)-4-methyl-6-(2-hydroxy-3-benzoyl-6-n-octyloxybenzyl)phenolYield 33.1%

Procedure

2-(2-Hydroxy-3-diethylaminomethyl-5-methylphenyl)-2H-benzotriazole (21.0 g, 0.067 mol), 2-hydroxy-4-n-octyloxybenzophenone (22.0 g, 0.067 mol), and p-cumene (80 g) are charged to a reaction flask. The mixture is heated to dissolve, and sodium methoxide (1.0 g, 25% in methanol) is added as catalyst. The solution is heated with agitation under a nitrogen flow at reflux (176°-178° C.) for 24 hours. After cooling to room temperature, the solution is filtered, and the black filtered solid (~1 g) is discarded. The product is then precipitated with methanol. The yellow solid (12.5 g) obtained is vacuum filtered, and identified using thin layer chromatography, with toluene:acetone (1:1 ) as the mobile phase. To remove the yellow color, the solid product is dissolved in hot toluene, and silica gel is introduced. The silica gel is gravity filtered hot. The toluene is removed by vacuum distillation, yielding 8.2 g of the title compound as an off-white solid, m.p. 124°-126° C.

Workup

  1. temperatureThe mixture is heated
  2. dissolutionto dissolve
  3. temperatureThe solution is heated with agitation under a nitrogen flow
  4. temperatureat reflux (176°-178° C.) for 24 hours
  5. filtrationthe solution is filtered
  6. filtrationthe black filtered solid (~1 g)
  7. customThe product is then precipitated with methanol

Sources & evidence

ORD record
ord-c0064b1e096e476fabe8fcf1bc80fe06
Source dataset
uspto-grants-1995_08
Patent number
US05439955

Reaction notes

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