Author Topic: Short Questions Thread (Read 10826 times)

Shake · « **Reply #900 on:** May 25, 2011, 02:33:50 PM »

Someone put me out of my misery...

Cinnamic acid yes or no

the MUST be a way here.. i mean look at it ffs.. so close yet so far away

LOL i just checked jons posts from science madness hahaha No wonder you call me jons brother i am exactly the same, maybe jon 10 years ago thats me

Quote

ummm mgso4 does'nt work for drying ammonia amine solutions already tried it.
and why bother passing ammonia water vapor through a column of NaOH?
i can tell you haven't actually done this, because what happens is NaOH cakes up and the back pressure builds and ammonia escapes and you get gassed.

haha that is so something that would happen to me

Tungsten. · « **Reply #901 on:** June 01, 2011, 12:21:22 AM »

So... Anybody have thoughts on:

heisenberg · « **Reply #902 on:** June 10, 2011, 02:16:08 AM »

Does this general scheme seem obviously impossible? Input would be greatly appreciated.

Sedit · « **Reply #903 on:** June 10, 2011, 04:38:33 AM »

@Tungsten

Doubtful I have never heard of a reducing agent able to proceed directly to the alkane from the carboxylic acid, odds are you will be left with an alcohol if anything. You may have to proceed from the ester first I can't fully remember but once you have the alcohol, halogenate it then reduce it to the alkane.

@Shake
Why not just use the Cinnamic acid to get high yields to Benzaldahyde else we are back to a similar question that Tungsten has only further complicated by the Pi bonding. BnO is nothing to scoff at and it smells so great I find it hard to stop smelling it, I have probably accumulated my fair share of Benzoic acid in my system due to hovering my nose above jars of it for hours.

@heisenberg
Whooo, someones been busy lol.

Tsathoggua · « **Reply #904 on:** June 10, 2011, 05:31:28 AM »

Benzaldehyde does smell great, doesn't it.

Nitromethane/nitroethane smell better though...like acetone with a hint of bitter almond/benzaldehyde/marzipan dissolved in it (not that I have ever dissolved marzipan in acetone, no plans to either), almost good enough to bake some sort of sweet, iced cake-like edible goods out of. Almost...

Tungsten. · « **Reply #905 on:** June 12, 2011, 07:40:45 PM »

Quote from: Sedit on June 10, 2011, 04:38:33 AM

@Tungsten

Doubtful I have never heard of a reducing agent able to proceed directly to the alkane from the carboxylic acid, odds are you will be left with an alcohol if anything. You may have to proceed from the ester first I can't fully remember but once you have the alcohol, halogenate it then reduce it to the alkane.

Thanks. I figured it wouldn't be a strong enough reducing agent. The halogenation then reduction is a good idea that I probably never would have thought of.

xxxxx · « **Reply #906 on:** June 15, 2011, 05:01:48 PM »

Just wondering if anybody has any experience with the Wacker Oxidation of Safrole in tert-Butanol using a Pd Acetate catalyst. I remember seeing someone refer to it here a few weeks ago. http://www.oocities.org/methamphetamine_x/wacker.h2o2.txt

It looks to good to be true. If it works as described I don't see why everyone isn't using the method. Anyone care to point out problems before I waste my time? Thanks!

Reference Attached

akcom · « **Reply #907 on:** June 15, 2011, 07:42:58 PM »

How are you guys getting your compressed O2? I'm currently using these aerosol type cans but they're a bit expensive for my taste.

xxxxx · « **Reply #908 on:** June 15, 2011, 07:57:47 PM »

The synthesis I posted doesn't use O2 but Hydrogen Peroxide. If your looking for O2 maybe you should check out those big oxyacetylene welding cylinders. I have no experience with them or how pure the gas is put it should be a good bit cheaper if you are using a lot.

Anyone have any ideas about the Wacker oxidation in t-butanol as above?

akcom · « **Reply #909 on:** June 16, 2011, 05:05:23 AM »

Palladium, just to be clear my question was a completely different tangent. But I do not see any reason why the H2O2 acetate wacker would not work

Sedit · « **Reply #910 on:** June 16, 2011, 06:00:35 AM »

Looking for solubility properties of Pseudoephedrine*HCl, in Alcohol pref MeOH.

Also looking for Solubility of N-Methyl-Amphetamine*HCl in MeOH.

Everything I find is either the freebase or only gives a vague value saying its soluble and nothing more.

Enkidu · « **Reply #911 on:** June 16, 2011, 06:37:24 AM »

Have you tried merck?

Sedit · « **Reply #912 on:** June 16, 2011, 03:54:52 PM »

Don't have it, my computers pretty fucked up

and the one copy I do have is seriously outdated. I may just see if I can find that old copy I have around the house.

RoidRage · « **Reply #913 on:** June 16, 2011, 05:41:17 PM »

Sedit, Here are the monographs for pseudoephedrine and N-methylamphetamine fro the latest Merck version...Only included the base + Hcl Salt

Sedit · « **Reply #914 on:** June 16, 2011, 06:07:43 PM »

Thank you.

Methyl Man · « **Reply #915 on:** June 16, 2011, 08:59:15 PM »

Quote from: akcom on June 15, 2011, 07:42:58 PM

How are you guys getting your compressed O2? I'm currently using these aerosol type cans but they're a bit expensive for my taste.

I haven't used it yet, but I bought a cylinder from the hardware store called "Worthington Pro Grade Oxygen." It's a bright red, approx 12" or 14" tall cylinder. I'm hoping it's pure enough for use where an O2 atmosphere is called for.

One thing that I don't understand is it says net weight is 1.4 oz. That sounds like a very small amount, yet the cylinder is almost the same volume as the propane torch ones that say they hold 16.9 oz. Is the density of propane versus oxygen THAT different? I hope the thing can at least fill up a couple of large balloons...

Methyl Man · « **Reply #916 on:** June 19, 2011, 06:41:14 PM »

Okay, never mind that stuff I posted above... I have a short question:

In the synthesis of benzoquinone via oxidation of hydroquinone in DCM using sodium nitrite and a drop of HCl (the scale being hydroquinone 24.4 g/100 mmol), if this were scaled up 8X, should the amount of HCl be scaled up proportionately (to 8 drops of HCl)?

xxxxx · « **Reply #917 on:** June 19, 2011, 06:46:06 PM »

I would assume that this is just to acidify/catalyse the reaction. I'd say it would be no problem to add 8 drops, just to ensure the reaction proceeds forward as expected,
Pd

akcom · « **Reply #918 on:** June 20, 2011, 01:22:11 PM »

MM, I've never scaled it up to that extent but I would add 8 drops simply to ensure complete conversion of the nitrite.

Does anyone have a copy of baalchemist's "Al/Hg-Nitro kickin up the yield" thread? My copy of thehive does not have this thread. If anyone could send it to me, it would be much appreciated.

Balkan Bonehead · « **Reply #919 on:** June 21, 2011, 01:28:09 AM »

In general, which is a more active reducer, Al/Hg, or Na/Hg? I daresay it is Na/Hg, since Na is the more electropositive of the two metals, but sometimes these things don't work out so nicely in practice.

Author Topic: Short Questions Thread (Read 10826 times)

Shake

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Tungsten.

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heisenberg

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Sedit

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Tsathoggua

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Tungsten.

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xxxxx

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akcom

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xxxxx

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akcom

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Sedit

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Enkidu

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Sedit

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RoidRage

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Sedit

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Methyl Man

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Methyl Man

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xxxxx

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akcom

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Balkan Bonehead

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