The Vespiary

The Hive => Novel Discourse => Topic started by: Elementary on June 12, 2002, 01:43:00 PM

Title: Styrene > Hydratropic Aldehyde
Post by: Elementary on June 12, 2002, 01:43:00 PM
This looks interesting  :)

Patent US3379768 (http://l2.espacenet.com/dips/viewer?PN=US3379768&CY=gb&LG=en&DB=EPD)



Abstract :

Hydratropic aldehyde is prepared by ozonizing the linear dimer of styrene and decomposing with a palladium catalyst in an aqueous medium containing suitable organic solvents. The hydratropic aldehyde is separated from benzaldehyde, which is also produced by the present process, in a pure state suitable for use in perfumes.

(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000320196-file_vbny.jpg)

And what can hydratropic aldehyde be easily converted to ???? yes P2P  ;)
John Lennon - Working Class Hero
Title: Comments and Q
Post by: Elementary on June 12, 2002, 05:15:00 PM
Most organic ozonides are explosive, as for the ozonide formed here I just can't say either way.

I can only assume that the palladium used decomposes the ozonide in a controlled tame fashion.

Ozone can be easy generated by exposing oxygen to ultra violet light, see here for more info :

http://www.ozonegeneratorairpurifierwastewatertreatmentpurification.com/ozone.htm (http://www.ozonegeneratorairpurifierwastewatertreatmentpurification.com/ozone.htm)



If this ozonide stage could be replaced by another method, we would have ourselves a great bulk method for the production of P2P using easily available chemicals.

Can anybody describe how a "Flash Distillation" is performed ?
John Lennon - Working Class Hero
Title: Info links
Post by: Elementary on June 12, 2002, 06:35:00 PM

http://www.cordis.lu/tmr/src/grants/fmbi/960833.htm (http://www.cordis.lu/tmr/src/grants/fmbi/960833.htm)



http://www.unil.ch/cost/chem/docs/D10/d10-01-98.htm (http://www.unil.ch/cost/chem/docs/D10/d10-01-98.htm)



"A Novel Synthetic Method of Hydratropic Aldehyde", maybe someone has access to this doc or a translation ?

http://periodicals.wanfangdata.com.cn/qikan/periodical/gdxxhxxb/gdxx2001/0108/0108mle.htm (http://periodicals.wanfangdata.com.cn/qikan/periodical/gdxxhxxb/gdxx2001/0108/0108mle.htm)



John Lennon - Working Class Hero
Title: > www.ozonegeneratorairpurifierwastewatertreatm...
Post by: Osmium on June 12, 2002, 09:08:00 PM
> www.ozonegeneratorairpurifierwastewatertreatmentpurification.com/

Who comes up with such domain names?!?
I'm not fat just horizontally disproportionate.
Title: The shorter ones were already taken ;-)
Post by: Rhodium on June 12, 2002, 09:21:00 PM
The shorter ones were already taken  ;)

Title: Examples of Ozonolysis
Post by: Elementary on June 14, 2002, 04:38:00 PM
Ozone is bubbled though a solution of the alkene in carbon tetrachloride.

(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000320196-file_hrp6.gif)

Oxidation of alkenes through ozonides.

(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000320196-file_8hfi.gif)

Ozonolysis of an olefin :

http://www.ch.ic.ac.uk/local/organic/18.html (http://www.ch.ic.ac.uk/local/organic/18.html)



Comment :

So it seems that palladium can be replaced with sulphuric acid (according to patent), or the reduction/degradation can be performed with Zinc powder.
John Lennon - Working Class Hero