4,4-dimethyl-8-propan-2-yl-2,3-dihydrochromene-6-carbaldehyde

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-Bromo-4,4-dimethyl-8-(propan-2-yl)-3,4-dihydro-2H-chromene (154 mg, 0.54 mmol) in tetrahydrofuran (5.44 mL) was cooled to −78° C. and n-BuLi (261 μL, 0.65 mmol) was added dropwise via a syringe. The reaction mixture was stirred at −78° C. for 30 minutes, and then DMF (168 μL, 2.17 mmol) was added dropwise. The resulting mixture was allowed to warm to room temperature, and stirred for 30 minutes before water was added. It was then extracted with EtOAc (2×) and the combined organic layers were dried over Na2SO4, filtered, and concentrated under vacuum. The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes to obtain the desired product as a colorless oil. to warm to room temperature was added It was then extracted with EtOAc (2×) the combined organic layers were dried over Na2SO4 filtered concentrated under vacuum The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-Bromo-4,4-dimethyl-8-(propan-2-yl)-3,4-dihydro-2H-chromene (154 mg, 0.54 mmol) in tetrahydrofuran (5.44 mL) was cooled to −78° C. and n-BuLi (261 μL, 0.65 mmol) was added dropwise via a syringe. The reaction mixture was stirred at −78° C. for 30 minutes, and then DMF (168 μL, 2.17 mmol) was added dropwise. The resulting mixture was allowed to warm to room temperature, and stirred for 30 minutes before water was added. It was then extracted with EtOAc (2×) and the combined organic layers were dried over Na2SO4, filtered, and concentrated under vacuum. The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes to obtain the desired product as a colorless oil. to warm to room temperature was added It was then extracted with EtOAc (2×) the combined organic layers were dried over Na2SO4 filtered concentrated under vacuum The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 6-Bromo-4,4-dimethyl-8-(propan-2-yl)-3,4-dihydro-2H-chromene (154 mg, 0.54 mmol) in tetrahydrofuran (5.44 mL) was cooled to −78° C. and n-BuLi (261 μL, 0.65 mmol) was added dropwise via a syringe. The reaction mixture was stirred at −78° C. for 30 minutes, and then DMF (168 μL, 2.17 mmol) was added dropwise. The resulting mixture was allowed to warm to room temperature, and stirred for 30 minutes before water was added. It was then extracted with EtOAc (2×) and the combined organic layers were dried over Na2SO4, filtered, and concentrated under vacuum. The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes to obtain the desired product as a colorless oil. to warm to room temperature was added It was then extracted with EtOAc (2×) the combined organic layers were dried over Na2SO4 filtered concentrated under vacuum The crude residue was purified by silica gel chromatography eluting with 0-10% EtOAc/Hexanes