Реакция #1481

Уравнение реакции

ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-trifluoromethylsulfonyloxy-naphthalen-2-yl)azo]benzoate

thiophene

t-BuLi

→

title compound

Ethyl 4-[(5,5-dimethyl-8-(2-thienyl)-5,6-dihydronaphthalen-2-yl)azo]benzoate

Растворители

THF

THF

NH4Cl

THF

Условия реакции

Обработка

1. 1
   workup.STIRRINGstirred for 1 h
2. 2
   ТемператураThe resulting mixture was heated at 50° C. for 2.5 h
3. 3
   Экстракцияextracted with ethyl acetate
4. 4
   СушкаThe combined organic layer was dried over Na2SO4
5. 5
   Концентрированиеconcentrated to an oil
6. 6
   ДругоеThe crude product was purified by flash chromatography (silica, ethyl acetate:hexane 5:95)

Методика

To a cold solution (-78° C.) of thiophene (0.07 ml, 0.75 mmol) in 1.5 ml of THF was added t-BuLi (0.457 ml, 0.75 mmol, 1.7M in pentane) and stirred for 2 h. To this solution, ZnCl2 (168 mg, 1.2 mmol) in 1.5 ml of THF was added. The resulting solution was warmed to room temperature, stirred for 1 h and was added (via cannula) to a solution of ethyl 4-[(5,6-dihydro-5,5-dimethyl-8-trifluoromethylsulfonyloxy-naphthalen-2-yl)azo]benzoate (Compound D11, 150 mg, 0.30 mmol) and tetrakis(triphenylphosphine)palladium(0) (10.6 mg) in 2.5 ml of THF. The resulting mixture was heated at 50° C. for 2.5 h. The reaction was diluted with sat. aqueous NH4Cl and extracted with ethyl acetate. The combined organic layer was dried over Na2SO4 and concentrated to an oil. The crude product was purified by flash chromatography (silica, ethyl acetate:hexane 5:95) to afford the title compound as a red foam.

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