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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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