Reaction #2298617

Reaction equation

(7-methylthieno[3,2-d]pyrimidin-4-yl)hydrazine hydrochloride

(7-Methylthieno[3,2-d]pyrimidin-4-yl)hydrazine hydrochloride

3-pyridinecarboxaldehyde

→

3-pyridinecarboxaldehyde(7-methylthieno[3,2-d]pyrimidin-4-yl)hydrazone

Yield 71.0%

Solvents

ethanol

Conditions

Workup

1. 1
   Temperaturewas heated
2. 2
   Temperatureat reflux for 4 hours
3. 3
   Filtrationthe solid product was collected by vacuum filtration
4. 4
   Otherrecrystallized from methanol

Procedure

A suspension of (7-methylthieno[3,2-d]pyrimidin-4-yl)hydrazine hydrochloride (5, 1.7 g, 7.9 mmol) and 3-pyridinecarboxaldehyde(1.1 g, 10.3 mmol) in ethanol (30 mL) was heated at reflux for 4 hours. After cooling to room temperature, the solid product was collected by vacuum filtration and recrystallized from methanol to yield 3-pyridinecarboxaldehyde(7-methylthieno[3,2-d]pyrimidin-4-yl)hydrazone (1.5 g, 71% yield) as white needles.

Source