Реакция #487495

Уравнение реакции

p-nitrobenzoic acid

thionyl chloride

→

4-nitrobenzoyl chloride

Выход 100.0%

Условия реакции

Обработка

1. 1
   Температураis heated
2. 2
   Температураto reflux for approximately 6-7 hours until a clear solution
3. 3
   Другоеis obtained
4. 4
   ДругоеExcess of thionyl chloride is removed by distillation
5. 5
   workup.ADDITIONhexane (1.5 L) is added
6. 6
   Другоеforming a precipitate, which
7. 7
   Фильтрацияis then filtered
8. 8
   Другоеdried under vacuum

Методика

A mixture of p-nitrobenzoic acid (500 g, 3.0 moles, 1 equiv) and thionyl chloride (600 mL, 8.2 moles, 2.73 equiv) is heated to reflux for approximately 6-7 hours until a clear solution is obtained. Excess of thionyl chloride is removed by distillation followed by co-distillation with toluene (300 mL). The reaction mass is cooled to room temperature, and hexane (1.5 L) is added, forming a precipitate, which is then filtered and dried under vacuum, yielding 4-nitrobenzoyl chloride as a yellow solid (530 g, approximately 100% yield), which is used without any further purification.

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