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Celite alternatives for filtering - MgCO3 & CaSO4?
One of the techniques for using celite is to first make a pad of celite in the buchner funnel and ta ... |
14-4-2018 at 18:07
by: AvBaeyer |
Help on Friedel Crafts alkylation and acylation of anisole and acetophenone
Dennis A:
I followed up your posted reference on Google Scholar and found quite a bit of interest ... |
14-4-2018 at 17:53
by: AvBaeyer |
Phenylacetonitrile from Phenylalanine
I think that using mixed and possible reactive solvents or PTC only complicates a rather simple situ ... |
13-4-2018 at 17:51
by: AvBaeyer |
Indoles forming salts?
The indole ring does not form any useful salts. The nitrogen is simply not basic. You should consult ... |
12-4-2018 at 18:39
by: AvBaeyer |
3-acetylindole
Cryolite,
I generally agree with you regarding reaction conditions if one is using a Friedel-Craf ... |
12-4-2018 at 18:30
by: AvBaeyer |
Phenylacetonitrile from Phenylalanine
I think the problem is the formation of "hot spots" around the insoluble particles of DBDMH just lik ... |
12-4-2018 at 18:13
by: AvBaeyer |
Phenylacetonitrile from Phenylalanine
As an addendum, I have recently tried using 1,3-dibromo-5,5-dimethylhydanoin (DBDMH) as the oxidizin ... |
11-4-2018 at 11:11
by: AvBaeyer |
3-acetylindole
karlos³
I have been trying to prepare 3-acetylindole using the widely cited acetic anhydride/ace ... |
11-4-2018 at 11:02
by: AvBaeyer |
reaction with Potassium Peroxymonosulfate (oxone)
Useful information on the utility of oxone in organic synthesis:
http://reag.paperplane.io/000023 ... |
9-4-2018 at 19:37
by: AvBaeyer |
tlc plate cutter
A scissor can cause bad edges which affect how the plate will run. You should use a ruler and a shar ... |
5-4-2018 at 18:22
by: AvBaeyer |
Deep Joy
Aga,
The photo you posted at the beginning is wonderful. The lighting and shadows are terrific. I ... |
5-4-2018 at 18:17
by: AvBaeyer |
Bad days in the lab or with glassware?
I was working with a solution of indole in ethanol today and some bad technique resulted in a minor ... |
1-4-2018 at 18:23
by: AvBaeyer |
Why are some esters formed easily and others not?
Consider that esters of nitrous acid, hypochlorous acid and boric acid do not form by the same mecha ... |
23-3-2018 at 18:26
by: AvBaeyer |
Compounds (API's) with various hydrate forms - what testing can differentiate these
In the "old days" hydrate numbers were obtained through regular elemental analysis IF you knew your ... |
10-3-2018 at 19:50
by: AvBaeyer |
Carbamazepine Synthesis
Ammonia is not very soluble in toluene and probably not very reactive either. If you want to use tol ... |
10-3-2018 at 19:38
by: AvBaeyer |
Preparation of “Absolute” Ethanol (<100 ppm water)
Magpie,
Your procedure is interesting but seems like a lot of work to get a relatively small amou ... |
25-2-2018 at 16:02
by: AvBaeyer |
What is the point of amateur chemistry?
What is the point of "amateur" chemistry? First and foremost, it allows you to explore the world on ... |
24-2-2018 at 19:57
by: AvBaeyer |
Acid Chlorides
Acid chlorides can be prepared using TCCA and triphenylphosphine. There are several publications tha ... |
21-2-2018 at 19:28
by: AvBaeyer |
Getting the Last of the Toluene out of the Product
UC235 is correct. Shredded paraffin in a desiccator is very efficient for removing residual volatile ... |
9-2-2018 at 19:03
by: AvBaeyer |
Mel-Temp melting point apparatus
There is an e-bay seller offering a Mel-Temp unit for $30 + shipping which he says is good for parts ... |
9-2-2018 at 18:59
by: AvBaeyer |
Homogeneous catalysts in condensation, charge
Read the chapters in Organic Reactions vol 1 on the Knoevenagel and related reactions. The book is i ... |
4-2-2018 at 19:56
by: AvBaeyer |
Dehydrating SnCl4 * 5H2O
Sulaiman is quite correct. There is no practical way to convert the pentahydrate to the anhydrous ti ... |
4-2-2018 at 19:50
by: AvBaeyer |
Preparation of Succinic Acid
Boffis,
Oxidation of GABA with TCCA to give 3-cyanopropionic acid should work as you proposed - g ... |
3-2-2018 at 19:31
by: AvBaeyer |
Piperidine from the hydrolysis of piperine
Chemi Pharma,
The function of the KOH is to absorb the water. Sieves might work if there is not t ... |
24-1-2018 at 19:28
by: AvBaeyer |
Preparation of 1,4-Dibromobutane
Tetrahydrofuran can be converted directly to 1,4-dibromobutane. Here is a reference from my files:
... |
19-1-2018 at 19:40
by: AvBaeyer |
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