Hydrochloric Acid → 4-[(5,6-Dihydro-5,5-dimethyl-8-(4-hydroxyphenyl)-2-naphthalenyl)ethynyl]benzoic acid

HRID 495923Notes

Reaction equation

[CH3:1][C:2]1([CH3:39])[CH2:11][CH:10]=[C:9]([C:12]2[CH:17]=[CH:16][C:15]([O:18][Si](CC(C)C)(C)C)=[CH:14][CH:13]=2)[C:8]2[CH:7]=[C:6]([C:26]#[C:27][C:28]3[CH:38]=[CH:37][C:31]([C:32]([O:34]CC)=[O:33])=[CH:30][CH:29]=3)[CH:5]=[CH:4][C:3]1=2.[OH-].[Na+].Cl>CCO.C1COCC1>[CH3:1][C:2]1([CH3:39])[CH2:11][CH:10]=[C:9]([C:12]2[CH:17]=[CH:16][C:15]([OH:18])=[CH:14][CH:13]=2)[C:8]2[CH:7]=[C:6]([C:26]#[C:27][C:28]3[CH:29]=[CH:30][C:31]([C:32]([OH:34])=[O:33])=[CH:37][CH:38]=3)[CH:5]=[CH:4][C:3]1=2

Participants

Conditions

Temperature: 50 °C

Procedure

To a solution of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-(4-((2,2-dimethylethyl)-dimethylsiloxy)phenyl)-2-naphthalenyl)ethynyl[benzoate (Compound I) 75.0 mg (0.143 mmol) in 3 ml of EtOH and 2 ml of THF was added 60.0 mg (1.50 mmol, 1.50 ml) of NaOH (1.0 M aqueous solution). The solution was heated to 50° C. for 2 hours, cooled to room temperature, and acidified with 10% HCl. Extraction with EtOAc, followed by drying over Na2SO4, and removal of the solvents under reduced pressure afforded the title compound as a colorless solid. 1H NMR (d6-acetone): δ 8.01 (2H, d, J=8.3 Hz), 7.59 (2H, d, J=8.4 Hz), 7.45 (2H, s), 7.20-7.17 (3H, m), 6.92-6.89 (2H, m), 5.97 (1H, t, J=4.7 Hz), 2.35 (2H, d, J=4.7 Hz), 1.34 (6H, s).

Workup

temperaturecooled to room temperature
extractionExtraction with EtOAc
dry with materialby drying over Na2SO4, and removal of the solvents under reduced pressure

Sources & evidence

ORD record: ord-57736ceb72d340d29a356925b64a02a7
Source dataset: uspto-grants-2005_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06942980B1

Reaction notes

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