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drying tube... odd configuration
Hey, I've only worked with drying tubes once before and they were simple and straight like this:

...
3-4-2013 at 09:38
by: GreenD
Regeneration of carbodiimides
Whoa:
"Procedure for regeneration of PS-cyclohexylcarbodiimide (PSCC). The polymer bound cyclohexyl ...
27-3-2013 at 10:59
by: GreenD
Regeneration of carbodiimides
Hey,

I'm trying to find a good general procedure for regenerating carbodiimides from the urea pro ...
27-3-2013 at 10:44
by: GreenD
Odd ratio, help?
A paper is suggesting column chromatography:
"...(Silica gel, 230-400 mesh, [b]Et[sub]2[/sub]O/pent ...
25-3-2013 at 13:45
by: GreenD
microscale column chromatography
Preparative TLC sounds like a great option, thanks very much.
14-3-2013 at 19:23
by: GreenD
microscale column chromatography
[rquote=277768&tid=23681&author=kristofvagyok]The only important thing is to use really fine ...
14-3-2013 at 10:26
by: GreenD
microscale column chromatography
I have done on pasteur pipettes, but it was only to achieve a truly crude product.

Thanks guys. ...
14-3-2013 at 10:24
by: GreenD
Latest chemical order?
Benzyl Amino Purine
13-3-2013 at 12:18
by: GreenD
microscale column chromatography
General question, have any of you done column chromatography with small amounts of compounds - 5-20m ...
13-3-2013 at 12:12
by: GreenD
SOCL2 -> Acid Chloride... Overnight?
Attempted again;
5g 0-methoxybenzoic acid was added to 25mL SOCl2 and the reaction stirred and brou ...
20-2-2013 at 10:17
by: GreenD
Nitriles - nucleophilic or electrophilic
PRetty clear, thanks.
15-2-2013 at 16:09
by: GreenD
Nitriles - nucleophilic or electrophilic
A friend made the claim that the Nitrogen of a nitrile would be nucleophilic, like the oxygen of a c ...
15-2-2013 at 15:40
by: GreenD
SOCL2 -> Acid Chloride... Overnight?
So.. Do you have any idea what I synthesized there?

I am out of LC/MS solvent at the moment but ...
11-2-2013 at 16:23
by: GreenD
SOCL2 -> Acid Chloride... Overnight?
Lo Siento.

The reaction was simple;

5g of o-methoxybenzoic acid was dissolved in 50mL of Thion ...
11-2-2013 at 10:38
by: GreenD
SOCL2 -> Acid Chloride... Overnight?
Totally lost now.

Tried to distill off the liquid, and the current temperature reading is 110°C. ...
10-2-2013 at 10:26
by: GreenD
SOCL2 -> Acid Chloride... Overnight?
I had a reaction of SOCl2 in with a benzoic acid which is reported to be quantitative under reflux f ...
10-2-2013 at 09:52
by: GreenD
Esterification scale-up = problems?!
So letting the reaction run over night, it went to completion.

For my work up I simply cool the ...
24-1-2013 at 10:50
by: GreenD
Esterification scale-up = problems?!
Not sure how a drying tube would work, but I understand the dean stark trap.

Do you know why a sc ...
23-1-2013 at 22:42
by: GreenD
Esterification scale-up = problems?!
I did NOT expect to have problems with an esterification reaction.

First trial;
1.5g 4-sulfamoyl ...
23-1-2013 at 17:08
by: GreenD
A challenge... how to get this product
Separate compound, but...
[img]http://img266.imageshack.us/img266/2041/cyprointermediate.jpg[/img]
...
18-1-2013 at 23:37
by: GreenD
A challenge... how to get this product
[rquote=272023&tid=22975&author=UnintentionalChaos]Just a thought here. Sulfonamides are fai ...
18-1-2013 at 12:11
by: GreenD
A challenge... how to get this product
Guys this is a science board, not a chat board.

I specifically put this in the beginning threads ...
18-1-2013 at 09:19
by: GreenD
A challenge... how to get this product
[rquote=271871&tid=22975&author=Nicodem][rquote=271806&tid=23071&author=GreenD]Would ...
17-1-2013 at 17:22
by: GreenD
Sulfonamide formation from "Ammonia"
I read a paper that was wonderful enough to describe the formation of a sulfonamide as

"Treating ...
16-1-2013 at 21:31
by: GreenD
A challenge... how to get this product
The alternative reaction, a p-sulfamoyl-cyano compound could be reacted with the carboxylic acid usi ...
14-1-2013 at 14:09
by: GreenD
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