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CAS No. : | 27452-17-1 | MDL No. : | MFCD05664407 |
Formula : | C14H19Br | Boiling Point : | - |
Linear Structure Formula : | BrC10H7(CH3)4 | InChI Key : | NLOOVMVNNNYLFS-UHFFFAOYSA-N |
M.W : | 267.21 | Pubchem ID : | 226685 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With tert.-butyl lithium;Zinc chloride; In tetrahydrofuran; diethyl ether; pentane; | EXAMPLE 1 Z,E and E,E-3-Methyl-5-[2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthalenyl)-1-cyclohexen-1-yl]-2,4-pentadienoic Acid Ethyl Ester To a stirred solution of 2.0 g of 2-bromo-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl)naphthalene in 20 ml of anhydrous tetrahydrofuran at -78 C. is added 9 ml of 1.7M tert-butyllithium in pentane, followed by the addition of 15 ml of zinc chloride, 0.5M in tetrahydrofuran. The mixture is allowed to warm to room temperature, 0.39 g of tetrakistriphenyl phosphinepalladium(0) and 1.0 g of ethyl 2-trifluoromethanesulfonyloxycyclohexen-1-ylcarboxylate in 5 ml of tetrahydrofuran is added and the resulting solution is stirred for 2 hours at the reflux temperature of the solvent. The reaction is cooled to room temperature, 50 ml of diethyl ether is added and the layers are separated. The organic layer is washed with water, aqueous sodium bicarbonate, saturated sodium chloride, and dried over sodium sulfate. Evaporation of the solution, followed by chromatography (silica gel: hexane/diethyl ether 4:1) gives 1.5 g of 2-(5,6,7,8-tetrahydro-5,5,8,8-tetramethyl-2-naphthalenyl)-1-cyclohexene-1-carboxylic acid, ethyl ester as a colorless solid. |