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Published December 2017Terephthalic acid (TPA) and dimethyl terephthalate (DMT) are consumed primarily to produce linear, saturated polyester resins, fibers, and films by reaction with glycols.Nearly all worldwide consumption of TPA and DMT is for the production of intermediate polyethylene terephthalate (PET) polymer.
[Edited on 9-1-2018 by James Nilep] I have seen SM used for theoritacal discussions about illegal substances, that’s why I thought posting here would be appropriate, this is definitely not meant to be a discussion about “how do I make such and such illegal compound”, rather a theoretical question about an alternate synthesis pathway.
I think the jury is still out on whether this thread violates the SM guidelines...
And if I’d be interested in cookery I wouldn’t be asking questions on SM Melgar, indole itself can form a Grignard reagent of some sort: Since it is a pyrrole, the proton that lies on the nitrogen is actually fairly acidic, and so it can be deprotonated there to give a nitrogen-centered anion.
However, the C-3 carbon is also fairly acidic due to ring resonance influenced by the benzene ring, so alternatively indole can be deprotonated there as well.
The following pie chart shows world consumption of TPA/DMT: Polyester fibers ultimately account for more than 60% of TPA/DMT consumption.
Another 33% goes into the manufacture of PET solid-state resin for bottles and other packaging applications.The manufacture of polyester film, PBT, and other minor products such as cyclohexanedimethanol (CHDM), terephthaloyl chloride, and copolyester-ether elastomers accounts for the remainder of TPA/DMT consumption.Increasing demand for polyester fibers will drive future consumption of TPA/DMT.Finally, a Gringnard reaction (presumably using some kind of catalyst) would yield the final DMT product.I know there are other relatively simple DMT syntheses, I’m just curious if this or a similar method could work.OP clearly knows too little chemistry to understand why this wouldn't work, and seems to be more interested in cookery than anything.Shulgin produced DMT by trimethylating tryptamine with methyl iodide, then demethylating the quaternary amine. I do know little about chemistry, but I understand that there would be a lot of tertiary amine polymers forming, I was curious if the rate polymerization would still allow for this reaction.Asia will account for about 83% of the world’s TPA/DMT consumption growth in the next five years.During 2012–17, consumption of TPA grew at an average annual rate of about 4%, which is lower than the average rate for the previous five years (5%).Can anyone think of an example of a Grignard reagent that contains a nitrogen atom? The ONLY case where I'd think it might be possible would be with certain heterocycles, which this obviously isn't.I'd assume that in this case, it'd just turn into a huge mess with all the alkylation going on.