Chemgineer
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Is there anything interesting I can do with Urea?
I've got too much of it!
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XeonTheMGPony
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excellent fertilizer.
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j_sum1
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Make hydrazine sulfate.
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Jenks
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Or concentrated ammonia.
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BromicAcid
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Ethylene carbonate
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rockyit98
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Making Graphitic carbon nitride (g-C3N4) from urea
https://www.sciencemadness.org/whisper/viewthread.php?tid=15...
"A mind is a terrible thing to lose"-Meisner
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monolithic
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Urea nitrate?
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karlos³
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Great to make amides from carboxylic acids.
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DraconicAcid
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Low-temperature eutectic solvents
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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karlos³
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Sodium-/potassium cyanate by the reaction of it with sodium-/potassium carbonate/hydroxide?
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student
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Barbiturates. Nobody else wanted to say it but that is why I am here.
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DraconicAcid
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I did not know that was an option. And here I was, making esters and shaking them with ammonia like a chump.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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karlos³
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Our mackolol made a writeup on oleic acid to oleamide with urea(and boric acid) next door, you might need to register, but its good stuff: https://www.thevespiary.org/talk/index.php?topic=18728.0;top...
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S.C. Wack
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AFAIK the usual directions (Vogel 3rd) either do not scale well or need improvement, and the method is overall rendered sucky by sublimation of
carbamate or whatever, on top of the gas evolution. Multiple bad things happen when heated above 195C.
When not used for explosives, it can be converted to nitrourea for semicarbazide or nitrous oxide.
Indirectly, urea has been used to decarboxylate amino acids to the parent amine.
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draculic acid69
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Is there a write-up for how to do this rxn anywhere? I think it will be useful for when I try to make some tertiary alcohols
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BromicAcid
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Haven't seen a write-up. I did some work on it years ago and would be glad to see someone else take it on:
http://www.sciencemadness.org/talk/viewthread.php?tid=2948
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Oxy
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Violuric acid can be made from barbituric acid.
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njl
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Details!
Reflux condenser?? I barely know her!
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S.C. Wack
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"It is said that" would have been the better choice for my wording.
https://www.sciencemadness.org/whisper/viewthread.php?tid=99...
BTW OS notes that urea is cheaper than cyanate for the synthesis of the easiest diazomethane precursor nitrosomethylurea (from methylamine), but few
readers may care.
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draculic acid69
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Diazomethane is a nasty animal indeed.
Anyone using or making it is batshit crazy.
I seen a bottle (4liter blue plastic) of the stuff
sitting on the driveway of a supply company one day.
I had read a few things that required diazomethane in there synths
and that's why I recognised this clearly labelled bottle. It was only layer
I was reading about diazomethane and it's hazards that I finally
realised what it was sitting away from anybody or the building by itself on the driveway. I remember my first thought upon seeing this was maybe I
could just help myself to this bottle of chemical they don't seem to want. I'm very glad I kept walking past it now.
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Lion850
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Student, Oxy, How to go from urea to barbituric acid (so that I can then go on to violuric acid and violurates)? Thank you.
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Boffis
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Quote: Originally posted by Lion850  | | Student, Oxy, How to go from urea to barbituric acid (so that I can then go on to violuric acid and violurates)? Thank you. |
Diethyl malonate + urea + sodium ethoxide; check out Vogel's Textbook of organic chemistry. Both 3rd and 5th editions are available online.
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S.C. Wack
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Vogel's is from OS, who in CV2 pg 60 mention other methods, all from urea.
| Quote: Originally posted by draculic acid69 | Diazomethane is a nasty animal indeed.
Anyone using or making it is batshit crazy.
I seen a bottle (4liter blue plastic) of the stuff
sitting on the driveway of a supply company one day. |
It's hard to believe that anyone would offer a solution of it for sale. The precursors for it are more insidious poisons. Count me as batshit crazy
(if anyone hasn't already), since I plan on making some soon; following abnormal directions that are safer than usual. A relevant thread will be
started, if it goes well. This will be from acetyl methylurea, and there might be better directions than Vogel's for acetamide from urea coming as
well.
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Praxichys
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Urea and ammonium nitrate mixed and heated with a silica catalyst gives guanidine nitrate at about a 60% yield. This opens the door to tetrazoles
among other things.
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ShotBored
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Agreed, deep eutectic solvents (DES) are cool! I made mine with urea and choline chloride. 2 part urea (MP 133C), 1 parts choline chloride (MP 302C)
creates a DES with a melting point of 12C! People have been using DES's for extracting precious metals from old batteries and stuff.
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