تفاعل #1937691

معادلة التفاعل

1-(4-methylphenyl)piperazine

Xantphos

sodium tert-butoxide

5-bromo-2,2,7-trimethyl-6-(4-methylphenyl)-2,3-dihydro-1-benzofuran

→

title compound

المردود 3.1%

1-[2,2,7-trimethyl-6-(4-methylphenyl)-2,3-dihydro-1-benzofuran-5-yl]-4-(4-methylphenyl)piperazine

المردود 3.1%

المذيبات

toluene

ظروف التفاعل

المعالجة

1. 1
   workup.ADDITIONwas added
2. 2
   درجة الحرارةunder heated
3. 3
   درجة الحرارةreflux for 15 hours
4. 4
   ترشيحthe reaction solution was subjected to Celite filtration
5. 5
   workup.ADDITIONWater was added to the filtration, and extraction
6. 6
   أخرىThe extract was dried
7. 7
   أخرىthe solvent was removed under reduced pressure
8. 8
   أخرىAfter that, the residue was purified by silica gel chromatography (hexane-ethyl acetate 10:1), and it
9. 9
   أخرىwas crystallized from acetonitrile

الإجراء التجريبي

To a solution of toluene (10 mL) containing 5-bromo-2,2,7-trimethyl-6-(4-methylphenyl)-2,3-dihydro-1-benzofuran (300 mg, 0.910 mmol) synthesized in Reference Example 157, 1-(4-methylphenyl)piperazine (160 mg, 0.910 mmol), Tris(dibenzylideneacetone)dipalladium (0) (24.9 mg, 0.027 mmol) and Xantphos (47.2 mg, 0.082 mmol), sodium tert-butoxide (131 mg, 1.36 mmol) was added, and the mixture was stirred under heated reflux for 15 hours. After cooled to room temperature, the reaction solution was subjected to Celite filtration. Water was added to the filtration, and extraction was performed using ethyl acetate. The extract was dried using anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. After that, the residue was purified by silica gel chromatography (hexane-ethyl acetate 10:1), and it was crystallized from acetonitrile to obtain 12.0 mg of the title compound as a white solid (yield 3%).

المصدر