Natural Science Forum / Chemistry / Organic Synthesis / May 2005

can anyone of you tell me where i can find something about protective
groups for phenolic OH-groups, especially for emodin and its
derivates? i've got to make some literature research about this topic,
but i haven't found much in the library on my university, so if anyone

test

Could it be possible to have small explosions or complete combustions
in a reactor used for the production of acetaldehyde from ethylene and
oxygen under a Palladium and Copper Chlorides solution as a
Catalysator? (Solution temperature 125 ?C, Pressure 3kg/cm2?g, 66%

Is it possible to produce this by azeotropic extraction of water traces with
hexane/heptane?
I have ethanol at 95% and want to produce a grade suitable for the malonic
ester synthesis.

Some help needed with my masters project please. I've managed to
C-acylate dimedone with Boc-homoleucine followed by condensation in
EtOH with benzylhydrazine.2HCl. The cyclic product of the 2nd step was
low yielding and took 100h (much longer than cited in literature),

Hello all, can anyone suggest a clean and high yield synthetic
procedure to diaminomaleonitrile avoiding polymerization.
Thank you in advance,
Irene

i wonder why imidazole is frequently the base of choice for silylation
of alcohols. what is its advantage over triethyl amine?
thank you.

I'm actually looking for a way to graft chemically a thin layer of a
compound which will finally comprise at least one available amine
function on a PMMA substrate, the final goal being to make an epoxy
reaction on the surface of the substrate. I thought of a

I Googled for references to KCH3 but didn't find much. One website refers to
it as "potassium monomethyl"
http://www.chem.arizona.edu/faculty/ziur/kch3.html
others call it "potassium methyl" and there are also references to

I've to alchilate the Meldrum's Acid with formyl chloride. Which is the best
way to synthetize the formyl chloride? I don't want and i can't use CO and
HCl under high pressure...
Thanx

I Googled for references to KCH3 but didn't find much. One website refers to
it as "potassium monomethyl"
http://www.chem.arizona.edu/faculty/ziur/kch3.html
others call it "potassium methyl" and there are also references to

I was wondering if the simple heating of Tyrosine to high temp. would
decarboxylate it to Tyramine, or if it has to be heated in conc. H2SO4
catalyst.  If it does decarboxylate without too many side rxns, could
this be applied to other suitable amino acids?