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TLC monitoring progress of STAB reductive am
When your reaction mixture is strongly (!) alkaline, you can extract the amine. The NaOH solution de ... |
26-11-2008 at 00:33
by: grind |
TLC monitoring progress of STAB reductive am
Oh I see I was wrong with the solvent mixture. Sorry....
May be the reaction product is still com ... |
21-11-2008 at 15:03
by: grind |
TLC monitoring progress of STAB reductive am
Your solvent mixture is not suitable for STAB reductions! Methanol destroys STAB quickly and you mus ... |
20-11-2008 at 22:28
by: grind |
reductive amination with triacetoxyborohydride
You can heat it to 150°C. The decomposition temperature is about 400°C, so 150°C are no problem. ... |
5-9-2008 at 09:01
by: grind |
reductive amination with triacetoxyborohydride
[quote][i]Originally posted by Klute[/i]
I only hav acces to a kitchen oven at home, and am very re ... |
5-9-2008 at 08:19
by: grind |
reductive amination with triacetoxyborohydride
[quote][i]Originally posted by stoichiometric_steve[/i]
[quote][i]Originally posted by grind[/i]
Q ... |
5-9-2008 at 06:24
by: grind |
reductive amination with triacetoxyborohydride
Thanks for the pics, Klute. Good work and very interesting!
Did you make an enamine from an amide ... |
5-9-2008 at 03:14
by: grind |
reductive amination with triacetoxyborohydride
[quote][i]Originally posted by Klute[/i]I have a few pictures if people are interested. [/quote]
IÂ ... |
4-9-2008 at 10:08
by: grind |
Vacuum grease substitute?
Here is a german wiki artikel about the conversion of normal starch into soluble starch with the aid ... |
15-5-2008 at 18:35
by: grind |
Vacuum grease substitute?
Heat glycerine to 160°C, add soluble (!) starch while stirring with a glass rod. Test a little port ... |
11-5-2008 at 14:45
by: grind |
Cleaning DCM/Chloroform
[quote][i]Originally posted by Klute[/i]
I have already washed some "dirty" chloroform with cold 30 ... |
10-5-2008 at 02:43
by: grind |
Cleaning DCM/Chloroform
[quote][i]Originally posted by vulture[/i]
Chloroform and strong bases are not compatible.[/quote]
... |
8-5-2008 at 17:08
by: grind |
Vacuum grease substitute?
A good vacuum grease is "kapsenberg schmiere" (ks) made from glycerine and soluble starch. It is wat ... |
8-5-2008 at 17:03
by: grind |
hydrolysis amine of a keto-alpha amine
Do you mean R-CO-CH2-NR´R´´? You can´t hydrolyze that. By the way, it´s called amino ketone. |
30-4-2008 at 18:47
by: grind |
Oxidation of hydroquinone with FeCl3
I think the oxidation of hydroquinone with FeCl3 does´nt give pure benzoquinone, but a 1:1 complex ... |
30-4-2008 at 18:38
by: grind |
benzyl alcohol oxidation
Another very easy way:
1. BnOH + HCl = BnCl
2. BnCl + Hexammin = quat. salt
3. quat. salt y ... |
24-4-2008 at 12:06
by: grind |
MTBE good substitute for Et2O?
I agree with garage chemist, Diphenylamine is a very good stabilizer. To all my ethers I added 5-10 ... |
23-4-2008 at 12:52
by: grind |
Preparation of sulfur monochloride S2Cl2
[quote][i]Originally posted by Klute[/i]
So the sulfur is soluble in hot chloroform?[/quote]
I thi ... |
20-4-2008 at 16:11
by: grind |
NaBH4/H4BK
http://www.rohmhaas.com/assets/attachments/business/process_chemicals/reducing_agents/reductive_amin ... |
19-4-2008 at 15:07
by: grind |
Preparation of sulfur monochloride S2Cl2
[quote][i]Originally posted by Klute[/i]
The use of chloroform could be handy to avoid dirty glassw ... |
19-4-2008 at 14:59
by: grind |
Preparation of sulfur monochloride S2Cl2
The whole procedure can be done in boiling chloroforme, this is much easier und gives excellent yiel ... |
17-4-2008 at 14:21
by: grind |
NaBH4/H4BK
[quote][i]Originally posted by Dimitri[/i]
Anyone heard of K borohydride being used in reductive am ... |
7-4-2008 at 16:49
by: grind |
NaBH4/H4BK
[quote][i]Originally posted by Klute[/i]
You would need to check the respective solubilities. IIRC, ... |
4-4-2008 at 16:25
by: grind |
Vacuum pump oil
The best what you can do now is to disassemble the pump completely and clean every component very ca ... |
1-4-2008 at 13:59
by: grind |
reductive amination with triacetoxyborohydride
4,29 g of finely powdered NaBH4 (assay 96%, 0,11 moles) is dried at 140°C in vacuum for 1 hour. It ... |
30-3-2008 at 21:04
by: grind |
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