From: Darren Rhodes (drhodes$##$globalnet.co.uk)
Date: Fri May 30 2003 - 08:46:13 EDT
Post the patent details - particularly the number. Darren.
----- Original Message -----
From: <fmohr$##$uwo.ca>
To: <everybody$##$orglist.net>
Sent: Friday, May 30, 2003 1:05 PM
Subject: ORGLIST:Lederer-Manasse Condensation
>
> My group is having problems with a seemingly simple reaction:
> The condensation of bromal with phenol to give Br3CCH(C6H4OH)2. The
synthesis
> of this coumpound is described in the patent literature, however we have
not
> been able to reproduce the preparation. Instead of a "colourless solid" we
> have consistently obtained a dark purple resinous gum, which proved to be
a
> horrible mess acording to HNMR. We have tried varying solvents, time,
> temperature and acid catalyst but with no sucess.
> Has anyone here got any advice or "magic tricks" to get this reaction to
work
> propperly or any other suggestions on how to get to this compound?
> Many thanks to the online organic chemistry community!
> F. Mohr
> Canada
>
>
> --
>
>
>
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