Реакция #163997

Уравнение реакции

(1,3,3-trimethyl-2,3-dihydro-1H-indol-2-yl)acetonitrile

(2Z)-2-[(2E)-3-methoxyprop-2-en-1-ylidene]-1-benzothiophen-3(2H)-one 1,1-dioxide

→

(2Z,3E,5Z)-5-(1,1-dioxido-3-oxo-1-benzothiophen-2(3H)-ylidene)-2-(1,3,3-trimethyl-1,3-dihydro-2H-indol-2-ylidene)pent-3-enenitrile

Условия реакции

Обработка

1. 1
   Другоеwere placed in a 10-mL one-necked round bottom flask
2. 2
   Температураcooled to room temperature
3. 3
   ЭкстракцияThe reaction mixture was extracted with dichloromethane (100 mL)
4. 4
   Другоеthe dichloromethane was evaporated
5. 5
   Другоеthe pure dye was obtained by recrystallization from methanol

Методика

A mixture of (1,3,3-trimethyl-2,3-dihydro-1H-indol-2-yl)acetonitrile (397 mg, 2.00 mmol) and (2Z)-2-[(2E)-3-methoxyprop-2-en-1-ylidene]-1-benzothiophen-3(2H)-one 1,1-dioxide (501 mg, 2.00 mmol) were placed in a 10-mL one-necked round bottom flask. The flask was heated in an oil bath at 210° C. for 2 hours and then cooled to room temperature. The reaction mixture was extracted with dichloromethane (100 mL). The organic solution was passed through a short silica column, the dichloromethane was evaporated and the pure dye was obtained by recrystallization from methanol. The yield was 511 mg of green crystals (63% of theory).

Источник