Saber
alias Picric-A
Posts: 56
Registered: 6-9-2008
Location: England
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Mood: vry vry bad mood
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Lab prep of Dimethyl Urea
Has anybody found a lab prep of Dimethyl urea?
I presume reating urea with Dimethyl Sulphate wont do it...
thanks,
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smuv
National Hazard
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Registered: 2-5-2007
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Mood: Jingoistic
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There are two dimethylureas. I will assume you mean sym-dimethylurea because I know how to make that.
| Quote: | Methylated Urea A mixture of 13.5 g. of methylamine hydrochloride and 6 g. of
urea was heated for 1 hour at 160-170'. The mass was extracted with boiling absolute
alcohol and filtered for the removal of undissolved ammonium chloride. The alcohol
solution was evaporated in a vacuum nearly to dryness, More ammonium chloride
separated. This was removed by filtration and rinsed with ice cold absolute alcohol.
Crystallization of the liquors yielded 6.9 g. of sym-dimethylurea, as colorless flakes,
m. p., 99.5-100°; yield, 78.4%. |
J. Am. Chem. Soc., 1916, 38 (11), 2503-2505
If you do it, post it, I have been planning to give this reaction a try...to make methylamides...
Next time post questions like this in beginnings. As a rule if you have not done any experiment or any research (essentially done nothing) and ask a
question put it in beginnings.
"Titanium tetrachloride…You sly temptress." --Walter Bishop
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Nicodem
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Thread Moved
16-5-2009 at 10:19 |
Nicodem
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Again somebody who believes there are mind readers on this forum. Saber, how is anybody to know which dimethyl urea you want?
I think the correct reference from which that citation originates is Journal of the American Chemical Society, 45 (1923) 1816-1820. The paper
was already uploaded in some other thread of this forum if I remember correctly.
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