Topic: organic chemistry question {synthesis from benzene} (Read 4701 times)

student1 · « **on:** October 17, 2012, 10:24:25 PM »

Hello Everyone.

If someone could please help with this question. Even just guide me a little as to how we're supposed to answer this.
Show the synthetic steps you would use in the preparation of the following compounds starting from benzene.

Thanks heaps in advance. Much appreciated.

* MOD Edit -- more descriptive title *

Arkcon · « **Reply #1 on:** October 17, 2012, 10:31:27 PM »

Can you apply some of the reactions that you know to begin to make any of these? What reactions do you know are specific to benzene, and what do the produce? That might help you start some of these.

student1 · « **Reply #2 on:** October 17, 2012, 10:34:55 PM »

I am really not sure how to start... do we take benzene and react it with Ch3cl and alch3? is that the first step?

Arkcon · « **Reply #3 on:** October 17, 2012, 10:36:01 PM »

Quote from: student1 on October 17, 2012, 10:34:55 PM

I am really not sure how to start... do we take benzene and react it with Ch3cl and alch3? is that the first step?

Good start. Now, what do you get?

student1 · « **Reply #4 on:** October 17, 2012, 10:42:50 PM »

Methyl Benzene..not sure what to add from there.

student1 · « **Reply #5 on:** October 20, 2012, 02:37:28 AM »

I have tried. For the last three,
iv) benzne+ch3cl/alcl3+benzne? ---can we add a benzene like that?

v) benzene+ch3cl/Alcl3+2(KMnO4)-

vi) benzene+ch3cl/alcl3+FeBr3/Br2+nBuli/DMF-

Is this correct? Thanks in advance.

Chartreuse · « **Reply #6 on:** October 21, 2012, 12:30:20 AM »

Well, let's try using the reagents you just mentioned, and see step by step products. From your answers we can find more certain assumptions.

4. If you add Benzene and CH3Cl/AlCl3, what will you get? Then, if you react it with another molecule of benzene, what do you think will happen?

5. What product did you yield with benzene and CH3Cl/AlCl3? What is the purpose of adding KMnO4? (By the way KMnO4 has no charge) Also, why do you think KMnO4 will work on the product you just got with Benzene + CH3Cl/AlCl3?

6. Perhaps you yield the same product with #4 if you add benzene and CH3Cl/AlCl3. Since we should have known that already, what reaction with occur by reacting that product with Br2/FeBr3? Then with NBL/DMF?

student1 · « **Reply #7 on:** October 21, 2012, 01:31:05 AM »

hmm so I think for
v) benzne-2(ch3cl/Alcl3)-you would get p-xylene .. then adding 02 and Co(iii) we get terephthalic acid....
is that it?

student1 · « **Reply #8 on:** October 21, 2012, 02:59:45 AM »

I can't edit the above post...just formatting the formulas. Sorry.

v) benzne-2(CH₃Cl/AlCl₃)-you would get p-xylene .. then adding O₂ and Co(iii) we get terephthalic acid....
is that it?

discodermolide · « **Reply #9 on:** October 21, 2012, 04:12:55 AM »

para- xylene can be oxidised to the do-acid quite easily.

Topic: organic chemistry question {synthesis from benzene} (Read 4701 times)

student1

organic chemistry question {synthesis from benzene}

Arkcon

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Re: organic chemistry question {synthesis from benzene}

Arkcon

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Re: organic chemistry question {synthesis from benzene}

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Chartreuse

Re: organic chemistry question {synthesis from benzene}

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Re: organic chemistry question {synthesis from benzene}

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Re: organic chemistry question {synthesis from benzene}

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