4-Nitroaniline → HCID 19975811, compound

Participants

Reaction Steps

4.5 g (24.8 mmol) of 7-Chloro-5-ethylpyrazolo[1,5-a]pyrimidine (Example 1, Step B) and 3.5 g (25.3 mmol) 4-nitroaniline were heated in 75 ml dry ethanol for 5 h. During evaporation of the mixture in vacuo crystals precipitated, which were dissolved in dichloromethane. The solution was washed with saturated sodium bicarbonate solution, dried over sodium sulfate, and evaporated to dryness in vacuo to give the title compound as a yellow powder,

Provenance & Evidence