| Pages:
1
2
3 |
clearly_not_atara
International Hazard
Posts: 2800
Registered: 3-11-2013
Member Is Offline
Mood: Big
|
|
The best anyone can do with that is "maybe" since we don't have a very good idea of how (or when) the acetonitrile reaction even works. It could all
decompose or it could go through a bis-imidoanhydride intermediate and give some oxalyl chloride.
But at a glance I would guess oxalic acid is decently soluble in acetonitrile, which makes it easier to try.
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
That's what I was thinking too, at least with the information I found about the dihydrate form and its polarity. I guess i have a new project to work
on!
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
Has anyone tried to use n chloro saccharin with oxalic acid? In this paper here
https://jpharmsci.org/article/S0022-3549(15)37404-9/pdf
It is mentioned that because the pka of saccharin is lower than that of other acids used for chlorination, it is a stronger chlorinator. If the pka of
cyanuric acid is 6.88 and it is known to work for making acyl halides via cyanuric chloride, would it make sense for chloro saccharin to work as well
when saccharin has a pka of of 1.31?
|
|
|
clearly_not_atara
International Hazard
Posts: 2800
Registered: 3-11-2013
Member Is Offline
Mood: Big
|
|
You're confusing electrophilic chlorination with nucleophilic chlorination. C3N3Cl3 transfers Cl-. ClN(SO2)COPh transfers Cl+. The two are not
interchangeable.
|
|
|
karlos³
International Hazard
Posts: 1520
Registered: 10-1-2011
Location: yes!
Member Is Offline
Mood: oxazolidinic 8)
|
|
That won't work as much as you can't halogenate acids with any of the other N-haloimides.
They are a source of monoatomic radical halogen ion, and that does not result in haloacids.
Cyanuric chloride is entirely different to TCCA if you drew that connection, the former is like an acid chloride of cyanuric acid, but the latter is
like the N-haloimide of cyanuric acid.
You see, TCCA is more like NBS and, and cyanuric chloride, which is a special case anyway.
Look at tautomerism of isocyanuric and cyanuric acid, the latter is the trialcohol, and in cyanur chloride those three alcohols are chlorinated, and
in isocyanuric acid of course the nitrogen groups.
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
https://onlinelibrary.wiley.com/doi/10.1002/9780470771273.ch...
Check this out. I'm not sure where to find an alpha chloro ether, but this paper has some interesting pathways
|
|
|
njl
National Hazard
Posts: 609
Registered: 26-11-2019
Location: under the sycamore tree
Member Is Offline
Mood: ambivalent
|
|
Alpha chloro ethers are byproducts of some reactions, chloromethyl-methyl ether being a notable one. They aren't particularly good for you. Cool paper
though, some of the other routes are interesting.
|
|
|
clearly_not_atara
International Hazard
Posts: 2800
Registered: 3-11-2013
Member Is Offline
Mood: Big
|
|
The best way I know to make alpha-halo ethers is to use the reaction of acetals with ZnCl2 and acetyl chloride 
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
Ah for fucks sake! Well we at least know acetyl chloride is doable thanks to chemplayer. I'm going to be trying his method using oxalic acid in 3 days
and if that doesn't work I'll try this way
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
For the synthesis of acid chlorides from cyanuric chloride, are acetone and triethylamine absolutely necessary? I think separating of the compounds
from acetone would be difficult, and although triethylamine is easy to get and cheap, amines are stinky and I dont enjoy using them much
|
|
|
Mateo_swe
National Hazard
Posts: 548
Registered: 24-8-2019
Location: Within EU
Member Is Offline
|
|
That paper you linked is very nice.
It takes up many different ways of preparation.
I include it for those who cant access it.
Attachment: Preparation of acyl halides.pdf (2.2MB)
This file has been downloaded 619 times
|
|
|
mr_bovinejony
Hazard to Others
Posts: 130
Registered: 20-4-2018
Member Is Offline
Mood: ASS
|
|
Cyanuric chloride is kinda shitty to work with. I've had two volcanoes so far but I think the third time is the charm.
45 g of cyanuric chloride
20 g propionic acid
100 mls dmf
50 mls dcm
The cyanuric chloride is dissolved into the dmf with small portions and about 2 minutes in between each portion. This is very important unless you
want a neat volcano and chlorine tears. At the end of the additions, not all had dissolved into the dmf but strong stirring was used and the acid
added in dcm. No reaction was observed. This will be stirred for 4 hours and worked up with a water wash and solvent evap.
This half assed write up is more of a warning for people working with cyanuirc chloride. Take great care with it, within my first 30 minutes of it
being unpacked 70 grams and 200 mls of dmf had gone up in the volcano
|
|
|
Mush
National Hazard
Posts: 633
Registered: 27-12-2008
Member Is Offline
Mood: No Mood
|
|
The preparation of organic compounds
Barnett, E. de Barry , 1912, p73
SULPHURYL CHLORIDE (SO2Cl2 ). Sulfuryl chloride
is but little used in the laboratory, but is employed to
a large extent technically for preparing acid chlorides
from the corresponding salts 3 (cf. p. 60). The
calcium salts give the best results. The reaction
takes place at the ordinary temperature, but very
intimate mixing is required.
CHLORSULPHONIC ACID (SO 2 OHC1). Chlorsulphonic
acid, obtained by passing dry hydrochloric acid gas
into oleum, is chiefly used for preparing the chlorides
of sulphonic acids directly from the aromatic hydro-
carbons. A large excess of the acid is used and
rise in temperature prevented. The yields are
excellent. 4
1, M. 22, III.
2, B. 37, 1453.
3, D.R.P. 151,864, 63,593.
4, D.R.P. 98,030 ; B. 12, 1848 ; 42, 1802, 2057.
DE63593C "poor yields are obtained"
"The process is not technically feasible"
Present DE151864C claims technically sufficient acetyl chloride
from raw, wood acetic acid lime (gray lime, calcium acetate) can be produced. Barium acetate also can be used. Disadvantage of this process is that
grinding of the reaction mass is necessary in ball mill.
Attachment: DE63593C.pdf (81kB)
This file has been downloaded 310 times
Attachment: DE151864C.pdf (190kB)
This file has been downloaded 306 times
[Edited on 13-3-2021 by Mush]
|
|
|
| Pages:
1
2
3 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
