تفاعل #1481

معادلة التفاعل

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

المذيبات

THF

THF

NH4Cl

THF

ظروف التفاعل

المعالجة

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

الإجراء التجريبي

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.

المصدر