Triethylamine → 4,4,7-Trimethyl-6-trimethylsilanylethynyl-1,2,3,4-tetrahydro-naphthalene-1-carboxylic acid ethyl ester

HRID 2377515Notes

Reaction equation

HRID 2377515 reaction equation
[CH2:1]([O:3][C:4]([CH:6]1[C:15]2[C:10](=[CH:11][C:12](OS(C(F)(F)F)(=O)=O)=[C:13]([CH3:16])[CH:14]=2)[C:9]([CH3:26])([CH3:25])[CH2:8][CH2:7]1)=[O:5])[CH3:2].C(N(CC)CC)C.[CH3:34][Si:35]([C:38]#[CH:39])([CH3:37])[CH3:36].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>[CH2:1]([O:3][C:4]([CH:6]1[C:15]2[C:10](=[CH:11][C:12]([C:39]#[C:38][Si:35]([CH3:37])([CH3:36])[CH3:34])=[C:13]([CH3:16])[CH:14]=2)[C:9]([CH3:26])([CH3:25])[CH2:8][CH2:7]1)=[O:5])[CH3:2]

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 8857Ethyl Acetate2×HCID 66111TrimethylsilylacetyleneHCID 588834474,4,7-Trimethyl-6-trifluoromethanesulfonyloxy-1,2,3,4-tetrahydro-naphthalene-1-carboxylic acid ethyl ester2×

Product 1

HCID 690745094,4,7-Trimethyl-6-trimethylsilanylethynyl-1,2,3,4-tetrahydro-naphthalene-1-carboxylic acid ethyl esterYield 34.5%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8058HexaneSolvent2×

Procedure

Following General Procedure D in a sealed tube and using 4,4,7-trimethyl-6-trifluoromethanesulfonyloxy-1,2,3,4-tetrahydro-naphthalene-1-carboxylic acid ethyl ester (Intermediate 192, 0.86 g, 2.2 mmol), triethyl amine (2 mL), copper(I)iodide (0.083 g, 0.44 mmol), trimethylsilyl acetylene (2 mL, 14 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.306 g, 0.44 mmol) followed by flash column chromatography over silica gel (230-400 mesh) using 5% ethyl acetate in hexane as the eluent, and preaprative normal phase HPLC using 5% ethyl acetate in hexane as the mobile phase in order to separate recovered starting material from the product, the title compound (0.26 g) was obtained.

Workup

  1. customto separate
  2. customrecovered

Sources & evidence

ORD record
ord-a726adc130ee4a6999a1005ca40ac4ed
Source dataset
uspto-grants-2008_12
Patent number
US07468391B2

Reaction notes

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