2-Dimethylaminopyridine → (Trimethylsilyl)ethyl 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoate

HRID 1238

Reaction equation

[CH3:1][C:2]1([CH3:24])[C:11]2[CH:10]=[C:9]([C:12]#[C:13][C:14]3[CH:22]=[CH:21][C:17]([C:18]([OH:20])=[O:19])=[CH:16][CH:15]=3)[CH:8]=[CH:7][C:6]=2[C:5](=[O:23])[CH2:4][CH2:3]1.CN(C1C=CC=CN=1)C.[CH3:34][Si:35]([CH:38](O)[CH3:39])([CH3:37])[CH3:36].Cl.CN(C)CCCN=C=NCC>C(Cl)Cl>[CH3:1][C:2]1([CH3:24])[C:11]2[CH:10]=[C:9]([C:12]#[C:13][C:14]3[CH:15]=[CH:16][C:17]([C:18]([O:20][CH2:39][CH2:38][Si:35]([CH3:37])([CH3:36])[CH3:34])=[O:19])=[CH:21][CH:22]=3)[CH:8]=[CH:7][C:6]=2[C:5](=[O:23])[CH2:4][CH2:3]1

Participants

Conditions

Temperature: 25 °C

Procedure

To a solution of 0.24 g (0.73 mmol) of 4-[(5,6,7,8-tetrahydro-8,8-dimethyl-5-oxonaphth-2-yl)ethynyl]benzoic acid (Compound 7) in 10 ml of dry CH2Cl2 was added 0.09 g (0.74 mmol) of dimethylaminopyridine, 0.115 ml (0.80 mmol) of trimethylsilylethanol and 0.17 g (0.88 mmol) of 1-(3-dimethylaminopropyl)-3-ethyl carbodiimide hydrochloride. The reaction mixture was stirred at 25° C. for 5 hours, washed with sat. aqueous NaHCO3 and brine, dried over Na2SO4 and concentrated in vacuo to an oil. Purification by flash chromatography (silica, 10% EtOAc-hexane) yielded the title compound as a white solid.

Workup

washwashed with sat. aqueous NaHCO3 and brine
dry with materialdried over Na2SO4
concentrationconcentrated in vacuo to an oil
customPurification by flash chromatography (silica, 10% EtOAc-hexane)

Sources & evidence

ORD record: ord-558960f60108438697a2928369019551
Source dataset: uspto-grants-1998_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05723620

Linked notes

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