Triethylamine → 2-[4-(8-Hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)-phenyl]-2-methyl-propionic acid methyl ester

HRID 2377340Notes

Reaction equation

HRID 2377340 reaction equation
[C:1]([C:3]1[CH:4]=[C:5]2[C:10](=[C:11]([OH:13])[CH:12]=1)[O:9][C:8]([CH3:15])([CH3:14])[CH2:7][C:6]2([CH3:17])[CH3:16])#[CH:2].[CH3:18][O:19][C:20](=[O:49])[C:21]([C:24]1[CH:29]=[CH:28][C:27](C#CC2C=C(C3CC3)C3OC4(CC4)CC(C)(C)C=3C=2)=[CH:26][CH:25]=1)([CH3:23])[CH3:22].C(N(CC)CC)C.C(OCC)(=O)C>CCCCCC.[Cu]I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH3:18][O:19][C:20](=[O:49])[C:21]([C:24]1[CH:25]=[CH:26][C:27]([C:2]#[C:1][C:3]2[CH:4]=[C:5]3[C:10](=[C:11]([OH:13])[CH:12]=2)[O:9][C:8]([CH3:15])([CH3:14])[CH2:7][C:6]3([CH3:17])[CH3:16])=[CH:28][CH:29]=1)([CH3:23])[CH3:22]

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 8857Ethyl AcetateHCID 211072286-Ethynyl-8-hydroxy-2,2,4,4-tetramethyl-chroman2×HCID 690773412-{4-[(8-Cyclopropyl-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1'-cyclopropane]-6-yl)ethynyl]-phenyl}-2-methyl-propionic acid methyl ester2×

Product 1

HCID 690754702-[4-(8-Hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)-phenyl]-2-methyl-propionic acid methyl ester

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8058HexaneSolvent

Procedure

Following General Procedure B and using 6-ethynyl-8-hydroxy-2,2,4,4-tetramethyl-chroman (Intermediate 19, 0.057 g, 0.25 mmol), methyl-2-(4-iodophenyl)-2-methyl-propionate (Reagent 2, 0.112 g, 0.37 mmol), triethyl amine (3 mL), copper(I)iodide (0.020 g, 0.1 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.07 g, 0.1 mmol) followed by flash column chromatography over silica gel (230-400 mesh) and preparative normal phase HPLC using 5% ethyl acetate in hexane as the mobile phase, the title compound was obtained as a brown oil (0.035 g, 35%).

Sources & evidence

ORD record
ord-b79cc5aa390740d9b6a5a392b9a0a91a
Source dataset
uspto-grants-2008_12
Patent number
US07468391B2

Reaction notes

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