2,4-dinitrophenol synthesis by electrophilic aromatic nitration of phenol

scalpere

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i asked AI for a complete synthesis of this substance, i want to know if this synthesis is reliable?

1. Preparation of the Reaction Mixture

- Place 5 g of phenol in a 100 mL beaker.

- Slowly add 10 mL of concentrated sulfuric acid while stirring. The phenol will dissolve and form a reddish solution.

- Cool the mixture to 0–5 °C using an ice bath.


2. Preparation of the Nitrating Agent

- In a separate container, carefully mix 10 mL of concentrated nitric acid with 10 mL of concentrated sulfuric acid. This mixture generates the nitronium ion (NO₂⁺), the electrophile in this reaction.

3. Nitration Reaction

- Slowly add the nitrating mixture dropwise to the cold phenol/sulfuric acid solution under constant stirring.
- Maintain the temperature below 15 °C during addition to control the reaction rate and prevent over-nitration.

Once the addition is complete, allow the mixture to warm to room temperature and stir for 30–60 minutes to complete the reaction.

4. Isolation of the Product

- Pour the reaction mixture into 300 mL of crushed ice water in a large beaker. A yellow precipitate of 2,4-dinitrophenol should form.

Collect the solid by vacuum filtration using a Büchner funnel.

Wash the crude product with cold distilled water to remove acid residues.

5. Purification

- Recrystallize the crude solid from hot ethanol or a mixture of ethanol and water to obtain pure yellow crystals of 2,4-dinitrophenol.

Dry the product at room temperature or under vacuum. Avoid high heat due to potential thermal instability.


i know there is no all details but do u think AI gave a reliable synthesis or this is not accurate enough to be copied?
 

dnBQByvHb8Zkawbjpx

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I'll preface by saying that my knowledge and experience is limited, but I've been interested in DNP for 20 years now and I'm scrambling to perform a synthesis myself in the coming months. Also, DNP is outside of the scope of the forum since DNP is not a psychoactive substance, so don't be surprised if this gets removed at some point.

In general the synthesis by nitration of phenol is well known and repeatedly performed by many, as well as documented in various patents. The process that you've posted is generally the same as shown in this video by Pyrotechnical. He starts by extracting phenol from aspirin and from there the remaining steps are the same (nitration, extraction, purification). In the video 95 % ethanol is used as the medium for the reaction which can be found in Russian patents describing the synthesis, but I've seen other documents that use H2SO4 instead.

To brush up on general knowledge related to the nitration of phenol I have this video in my notes. It covers the topic quite well in my opinion, and it matches your process well (no ethanol, only H2SO4 as medium).

While the process in your post is generally correct (I can't confirm the exact quantities and other numbers), I would not rely on AI beyond some basic research on a given topic. It is known to provide bogus or outright incorrect claims at times and this stuff is no joking matter with serious real life implications if mistakes are made. I recommend you watch the linked video and read few patents regarding the synthesis of DNP to use as a starting point. That's what I do, anyway.

Finally, think twice regarding the last step of drying. DNP is usually kept moist/wet to limit the risk of explosion, although it is not as serious as popular sources make it to be.

edit: HEISENBERG almighty, I plead to you that DNP is tolerated on the forum. Thank you for your consideration.
 
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scalpere

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DNP has nootropic effects if i read correctly. so for me DNP deserves to be accepted here !! but yeah thats not a « drug » like stims, opi…

thx for the vid !
 
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