Acetic Acid → Methyl 2-thiophenecarboximidate

2-cyanothiophene (5.46 g, 50 mmol) was dissolved in methanol (25 ml), and sodium methoxide (0.27 g, 5 mmol) was added. The mixture was stirred at room temperature for 18 hours. After the reaction was completed, acetic acid (0.33 g, 5.5 mmol) was added to neutralize the reaction solution, and the solution was concentrated under reduced pressure. Diethyl ether (40 ml) was added to the concentrated residue, and insolubles were removed by filtration. The filtrate was concentrated under reduced pressure to give the crude product of methyl 2-thiophenecarboximidate (6.35 g) as a yellow oil.

1. concentrationthe solution was concentrated under reduced pressure
2. additionDiethyl ether (40 ml) was added to the concentrated residue, and insolubles
3. customwere removed by filtration
4. concentrationThe filtrate was concentrated under reduced pressure

ORDレコード

ord-bcf260765b9443cc9416a9fa725d3fc9

出典データセット

uspto-grants-1993_12

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05272164