Triethylamine → 3,4-Dihydro-4,4-dimethyl-6-(trimethlsilanyl)ethynylspiro[2H-1-benzopyran-2,1'-cyclopropane]

HRID 1069868Notes

Reaction equation

HRID 1069868 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]2[O:12][C:9]3([CH2:11][CH2:10]3)[CH2:8][C:7]([CH3:14])([CH3:13])[C:6]=2[CH:15]=1.C(N(CC)CC)C.[CH3:23][Si:24]([C:27]#[CH:28])([CH3:26])[CH3:25]>[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.O1CCCC1>[CH3:13][C:7]1([CH3:14])[C:6]2[CH:15]=[C:2]([C:28]#[C:27][Si:24]([CH3:26])([CH3:25])[CH3:23])[CH:3]=[CH:4][C:5]=2[O:12][C:9]2([CH2:11][CH2:10]2)[CH2:8]1

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 22568885HCID 22568885, compound2×

Product 1

HCID 225688793,4-Dihydro-4,4-dimethyl-6-(trimethlsilanyl)ethynylspiro[2H-1-benzopyran-2,1'-cyclopropane]

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

Following general procedure D and using 6-bromo-3,4-dihydro-4,4-dimethylspiro[2H-1-benzopyran-2,1′-cyclopropane] (Intermediate 36, 0.44 g, 1.65 mmol), triethyl amine (4 mL), anhydrous tetrahydrofuran (5 mL), copper(I)iodide (0.95 g, 0.5 mmol), trimethylsilyl acetylene (1.62 g, 16.5 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.4 g, 0.56 mmol), the title compound was obtained as a brown oil (0.4 g, 86%).

Sources & evidence

ORD record
ord-d2ee3cdc0ca24831964abb367ce8d578
Source dataset
uspto-grants-2001_06
Patent number
US06252090B1

Reaction notes

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