Formic Acid → 5-Benzenesulfonyl-2-(2-hydroxy-3-alpha-cumyl-5-tert-octylphenyl)-2H-benzotriazole

HRID 990198Notes

Reaction equation

[C:1]1([S:7][C:8]2[CH:40]=[CH:39][C:11]3=[N:12][N:13]([C:15]4[CH:20]=[C:19]([C:21]([CH2:24][C:25]([CH3:28])([CH3:27])[CH3:26])([CH3:23])[CH3:22])[CH:18]=[C:17]([C:29]([C:32]5[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=5)([CH3:31])[CH3:30])[C:16]=4[OH:38])[N:14]=[C:10]3[CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C1(C)C(C)=CC=CC=1.C(O)=[O:50].OO.[OH2:54]>O.O.[O-][W]([O-])(=O)=O.[Na+].[Na+]>[C:1]1([S:7]([C:8]2[CH:40]=[CH:39][C:11]3=[N:12][N:13]([C:15]4[CH:20]=[C:19]([C:21]([CH2:24][C:25]([CH3:26])([CH3:27])[CH3:28])([CH3:23])[CH3:22])[CH:18]=[C:17]([C:29]([C:32]5[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=5)([CH3:30])[CH3:31])[C:16]=4[OH:38])[N:14]=[C:10]3[CH:9]=2)(=[O:50])=[O:54])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

Conditions

Temperature: 50 °C

Procedure

A 1000 mL flask is charged with 75.2 g of 5-phenylthio-2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazole, prepared in Example 4, 102 g of xylene, 0.9 g of sodium tungstate dihydrate and 18.4 g of formic acid. The mixture is heated to 50° C. To this stirred mixture is slowly added 36.3 g of 50% hydrogen peroxide so that the temperature does not exceed 85° C. Additional xylene and water are then added. The organic layer is separated, washed with aqueous sodium sulfite, then twice with water and concentrated. The crude product residue is recrystallized from methanol to yield 75.2 g of the title compound as a light yellow solid melting at 170-171° C.

Workup

customdoes not exceed 85° C
customThe organic layer is separated
washwashed with aqueous sodium sulfite
concentrationtwice with water and concentrated
customThe crude product residue is recrystallized from methanol

Sources & evidence

ORD record: ord-d7e79fe91fc448469450eae3b7e18986
Source dataset: uspto-grants-2002_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06458872B1

Reaction notes

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