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

HRID 1870032Notes

Reaction equation

HRID 1870032 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 preparative 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-afe5f2831fbd4f90a1674347d9f1a37e
Source dataset
uspto-grants-2009_12
Patent number
US07638648B2

Reaction notes

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