Author Topic: Syringaldehyde How watched is this??  (Read 997 times)

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LiquidGaia

  • Guest
Syringaldehyde How watched is this??
« on: March 11, 2003, 10:23:00 AM »
I haven't found any data if Syringaldehyde  is watched or not I know most peope would rather make it from vanillin, but Syringaldehyde does have cosmetic applications. Would ordering anywhere from 500g to 1kg of this be suspicious?

thx.

going to try the following proceedure
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In an apparatus similar to Example 1, 15.2 g (0.083 mol) of syringaldehyde and 15.0 g (0.11 mol) of potassium carbonate were heated to 105°C under nitrogen and 15 ml (0.12 mol) of trimethyl phosphate were added over 10 minutes. The mixture was maintained at about 80° C. for 3 hours then cooled to 45° C. and quenched with 50 ml of H2 O. The tan solid which precipitated was collected, washed with 3×50 ml of water and dried to give 15 g (92%) of 3,4,5-trimethoxybenzaldehyde.
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@ a 10x scale or so.
this would be followed by the nitrostryene and then a catalytic reduction.  Also I would like to try the Zn+Hcl method and see how that works.

thanks for any help.




karl

  • Guest
I think any purchase like that is very likely...
« Reply #1 on: March 11, 2003, 10:33:00 AM »
I think any purchase like that is very likely to be taken suspiciously. It's too close. How obscure are its cosmetic uses?

walpur6isknight

  • Guest
watch list
« Reply #2 on: March 12, 2003, 04:55:00 AM »

Mr_Wrath

  • Guest
typo
« Reply #3 on: March 12, 2003, 07:16:00 AM »
That 105 C part of the procedure is a typo -- intentional or not, I don't know. Try it at 115C. 113-115 is the melting point of syringaldehyde, and this is referred to as a 'melt phase reaction' in the patent.

Mr_Wrath

  • Guest
also
« Reply #4 on: March 12, 2003, 07:20:00 AM »
The Zn/HCl reduction works. If I remember correctly, the final product can be crystalized from ethanol-water -- add the one in which it is not soluble first.