4-[2-[5,6-Dihydro-5,5-dimethyl-8-[[(trifluoromethyl)sulfonyl]oxy]-2-naphthalenyl]ethynyl]benzoic acid ethyl ester → HCID 18630898, compound
Reaction equation
[CH3:1][C:2]1([CH3:39])[CH2:11][CH:10]=[C:9]([C:12]2C=[CH:16][C:15](O[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][CH2:35][CH3:36])=[O:33])=[CH:30][CH:29]=3)[CH:5]=[CH:4][C:3]1=2.CC1(C)CC=C(O[S:52](C(F)(F)F)(=O)=O)C2C=C(C#CC3C=CC(C(OCC)=O)=CC=3)C=CC1=2>>[CH3:1][C:2]1([CH3:39])[CH2:11][CH:10]=[C:9]([C:12]2[S:52][C:15]([CH3:16])=[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][CH2:35][CH3:36])=[O:33])=[CH:30][CH:29]=3)[CH:5]=[CH:4][C:3]1=2Participants
Reactant 2
Product 1
Procedure
Employing the same general procedure as for the preparation of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-(4-methylphenyl)-2-naphthalenyl)ethynyl]benzoate (Compound 1), 170.0 mg (0.366 mmol) of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-(trifluoromethylsulfonyl)oxy-2-naphthalenyl)ethynyl]benzoate (Compound G) was converted into the title compound (colorless solid) using 202.0 mg (1.48 mmol) of zinc chloride, 24 mg (0.022 mmol) of tetrakis(triphenylphosphine)palladium(0) in 2.0 ml of THF, and 5-methyl-2-lithiothiophene (prepared by adding 58.6 mg (0.36 ml, 0.915 mmol) of n-butyllithium (2.5 M solution in hexanes) to a cold solution (−78° C.) of 89.8 mg (0.915 mmol) of 2-methylthiophene in 2.0 ml of THF). 1H NMR (CDCl3): δ 8.00 (2H, d, J=8.3 Hz), 7.59 (1H, d, J=1.7 Hz), 7.55 (2H, d, J=8.2 Hz), 7.43 (1H, dd, J=1.7, 8.0 Hz), 7.35 (1H, d, J=8.0 Hz), 6.87 (1H, d, J=3.5 Hz), 6.74 (1H, d, J=2.8 Hz), 6.15 (1H, t, J=4.8 Hz), 4.38 (2H, q, J=7.1 Hz), 2.52 (3H, s), 2.32 (2H, d, J=4.8 Hz). 1.40 (3H, t, 7.1 Hz), 1.32 (6H, s).
Sources & evidence
- ORD record
- ord-1d6edd6e34ab4058aced97df951a7d77
- Source dataset
- uspto-grants-2003_02
- Patent number
- US06521624B1
Reaction notes
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