# LogP FDOPA

In response to Dr. Ilonka Guenther's request for a logP value for FDOPA:
Although I do not have an experimental value for FDOPA, a logP is
easily calculated. L-DOPA has an experimentally measured logP
of -2.39 (Sangster Database of Evaluated LogKow Values, 1994).
Using Syracuse Research Corp's KOWWIN Program, the logP of
the fluoro derivative of L-DOPA is calculated to be -2.19 using the
program's Experimental Value Adjusted method (which uses the
experimental L-Dopa value and then adjusts for the fluoro-substitution).
Estimating the logP from structure alone, the KOWWIN Program gives
a value of -2.04. The ClogP for Windows Program (BioByte Corp) gives
a value of -2.29. The ACD/LogP Program (ACD/Labs) estimates 0.46
and the PrologP51 Program (CompuDrug Corp) estimates 0.12. The
ACD/LogP and PrologP programs do not consider the zwitterionic
nature of the compound.
***********************************
Bill Meylan
Syracuse Research Corp
e-mail: meylan at.at syrres.com
phone: 315 426-3303
fax: 315 426-3429
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>Dear Colleagues,
>I am looking for the logP value of FDOPA.
>Does anyone has calculated it once or know where to find this value either
>calculated or measured?
>Thanks for any help.
>Kind regards,
> Ilonka Guenther