Hi Geoff,

I completely agree, it is also important to have full reactions stored 
because they allow you to calculate, e.g., physico-chemical parameters 
from the full molecule structures of know reactions (which might be 
helpful to estimate whether the reaction will run - well, this would be
for the later stage of the project ;-) ).

But for retrosynthesis analysis I think you need something more general 
than full reactions, i.e. SMIRKS.

I also agree that both sides, a open reaction repository and a open
SMIRKS repository for (retro)reactions would have an enormous potential.
I emphasize "open" because all commercial efforts on retrosynthesis
kind of stalled - and most reaction databases are closed which is also
unfortunate.

Best,
Markus

On 7/24/2012 12:52 PM, Geoff Hutchison wrote:
>> Putting together a Open Reaction Database is probably a really
>> good idea, however - although closely related, of course - for retro-
>> synthesis analysis you might alternatively put together a collection
>> of SMARTS and SMIRKS patterns
>
> Ideally, such a reaction database would be in SMIRKS. (IIRC, SMIRKS is a 
> superset of reaction SMARTS, so you wouldn't need "SMARTS" per-se -- they're 
> already part of the SMIRKS.) While it's fairly easy to generate reaction 
> SMILES (e.g., using Open Babel) for specific reactions, generating the SMIRKS 
> would be a bit harder.
>
> This is one reason I've been pushing for OSRA and ChemDraw files, since 
> academic instructors could probably be talked into giving up lecture notes 
> with general reaction schemes.
>
> I think there would be *lots* of interesting applications. It looks like Abe 
> has made a database from the patent literature, but I don't know if it's yet 
> available in file form:
> http://nar.oxfordjournals.org/content/40/D1/D428
> http://dcv.uhnres.utoronto.ca/SCRIPDB/search/
>
> Cheers,
> -Geoff
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-- 

  Markus Sitzmann, Ph.D.

  Chemical Biology Laboratory
  Center for Cancer Research
  National Cancer Institute
  National Institutes of Health

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  301-846-6033 (fax)

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