Sodium Hydroxide → 2-Fluoro-4-(8,8-dimethl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2yl-ethynyl)-benzoic Acid

HRID 1861324Notes

Reaction equation

C([O:3][C:4](=[O:27])[C:5]1[CH:10]=[CH:9][C:8]([C:11]#[C:12][C:13]2[CH:22]=[CH:21][C:20]3[C:19](=[O:23])[CH2:18][CH2:17][C:16]([CH3:25])([CH3:24])[C:15]=3[CH:14]=2)=[CH:7][C:6]=1[F:26])C.[OH-].[Na+]>C(O)C.CO.O1CCCC1>[F:26][C:6]1[CH:7]=[C:8]([C:11]#[C:12][C:13]2[CH:22]=[CH:21][C:20]3[C:19](=[O:23])[CH2:18][CH2:17][C:16]([CH3:25])([CH3:24])[C:15]=3[CH:14]=2)[CH:9]=[CH:10][C:5]=1[C:4]([OH:27])=[O:3]

Participants

Conditions

Temperature: 70 °C

Procedure

A solution of 2-fluoro-4-(8,8-dimethyl-5-oxo-5,6,7,8-tetrahydro-naphthalen-2-ylethynyl)benzoic acid ethyl ester (Compound 9, 0.1 g, 0.274 mmol) in ethanol(4 mL), methanol (2 mL) and tetrahydrofuran (2 mL) was treated with 1M aqueous sodium hydroxide solution and heated at 70° C. for 1 h. The volatiles were distilled off in vacuo and the residue was diluted with water and dilute hydrochloric acid and extracted with ethyl acetate (×2). The combined organic extract was dried over anhydrous sodium sulfate, filtered and evaporated in vacuo to afford a solid that was recrystallized from hot aqueous acetonitrile to afford the title compound (0.025 g, 27%).

Workup

distillationThe volatiles were distilled off in vacuo
additionthe residue was diluted with water and dilute hydrochloric acid
extractionextracted with ethyl acetate (×2)
extractionThe combined organic extract
dry with materialwas dried over anhydrous sodium sulfate
filtrationfiltered
customevaporated in vacuo
customto afford a solid
customthat was recrystallized from hot aqueous acetonitrile

Sources & evidence

ORD record: ord-5e69f0bfcf6f4b24a61e7484039e37df
Source dataset: uspto-grants-2003_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06531599B2

Reaction notes

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