2-Methylbenzenesulfonic acid hydrate → 2-hydroxy-1-{2-[2-(4-trifluoromethyl-phenoxymethyl)-1H-benzoimidazol-5-yl]-phenyl}-ethanone

HRID 1433216Notes

Reaction equation

C([Si](C)(C)[O:6][C:7]1([C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[C:16]2[CH:36]=[CH:35][C:19]3[NH:20][C:21]([CH2:23][O:24][C:25]4[CH:30]=[CH:29][C:28]([C:31]([F:34])([F:33])[F:32])=[CH:27][CH:26]=4)=[N:22][C:18]=3[CH:17]=2)[CH2:9][O:8]1)(C)(C)C.O.C1(C)C(S(O)(=O)=O)=CC=CC=1>C1COCC1>[OH:8][CH2:9][C:7]([C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=1[C:16]1[CH:36]=[CH:35][C:19]2[NH:20][C:21]([CH2:23][O:24][C:25]3[CH:30]=[CH:29][C:28]([C:31]([F:33])([F:34])[F:32])=[CH:27][CH:26]=3)=[N:22][C:18]=2[CH:17]=1)=[O:6]

Participants

Conditions

Temperature: 80 °C

Procedure

A reaction mixture of 5-{2-[2-(tert-butyl-dimethyl-silanyloxy)-oxiranyl]-phenyl}-2-(4-trifluoromethyl-phenoxymethyl)-1H-benzoimidazole (0.072 g, 0.134 mmol) and toluenesulfonic acid monohydrate (0.031 g, 0.161 mmol) in THF (2 mL) was heated to 80° C. and stirred for 2 hours. The reaction mixture was concentrated and the residue was purified by chromatography (silica, hexanes: EtOAc, 1:2) to afford the title compound as a brown oil (0.053 g, 92%). 1H NMR (400 MHz, CD3OD) δ (ppm): 7.64 (d, 2H, J=9.2 Hz), 7.62-7.56 (m, 2H), 7.54-7.46 (m, 4H), 7.26-7.23 (m, 3H), 5.45 (s, 2H), 4.06 (s, 2H). Mass Spectrum (LCMS, ESI pos.) Calcd. For C23H18F3N2O3: 427.4 (M+H), Found 427.0.

Workup

concentrationThe reaction mixture was concentrated
customthe residue was purified by chromatography (silica, hexanes: EtOAc, 1:2)

Sources & evidence

ORD record: ord-106079dc6a6a47bcb3c55c4e4865fdfa
Source dataset: uspto-grants-2009_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07612211B2

Reaction notes

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