Ethynylcyclohexane → HCID 10402251, compound

Participants

Reaction Conditions

Reaction Steps

This reaction is carded out under anhydrous conditions. Cyclohexylacetylene (700 mg; 6.47 mmol) in 10 mL. THF is cooled to 0° C. To this is added 2.5M n-BuLi (3.0 mL; 7.44 mmol) and stirred for 30 min. at 0° C. under N2 atm and then 1.0M ZnCl2 (7.4 mL; 7.44 mmol). This is allowed to warm to room temperature and stirred for 3/4 hour. The reaction mixture is transferred via cannula to a flask containing 6,7-dimethoxyquinolin-3-yl trifluoromethane sulfonate (500 mg; 1.48 retool) and Pd(PPh3)4 (83 mg; 0.074 mmol) in 4 mL of THF. This is then heated to 50° C. under N2 for 41/2 hours. The reaction mixture is then poured into 90 mL of 10% NH40OH, diluted with CHCl3 and stirred for 20 min. The aqueous layer is separated, and the organic layer washed with brine, dried over MgSO4, filtered, evaporated and chromatographed with 4:1 hexane: EtOAc to obtain 3-cyclohexylethynyl-6,7-dimethoxyquinoline, which is recrystallized from hexane, identified by NMR and used directly in the next step.

Provenance & Evidence