How would you synthesize the following compound starting from benzene? More than one step is nee

step 1 All right. So you have this parinitrobenzoic acid as a product. And they're just asking you to m

How would you synthesize the following compound starting...

Key Concepts

Electrophilic Aromatic Substitution

This is a fundamental reaction mechanism in aromatic chemistry whereby an electrophile replaces a hydrogen atom on an aromatic ring. It encompasses reactions like nitration, sulfonation, halogenation, and alkylation and acylation, which are key methods to introduce functional groups onto benzene.

Friedel-Crafts Reaction

This includes both Friedel-Crafts alkylation and acylation, which are specialized forms of electrophilic aromatic substitution. These reactions enable the attachment of alkyl or acyl groups to a benzene ring and are typical starting points for further functional group transformations in multi-step syntheses.

Functional Group Transformations

These are processes that convert one functional group into another, allowing chemists to modify molecules in a controlled manner. They are essential in multi-step syntheses from benzene, where an initial direct substitution might be followed by reactions such as oxidation, reduction, or further substitutions to achieve the target compound.

Directing Effects

Substituents already present on the benzene ring influence both the reactivity and the site of further electrophilic substitutions. Activating groups tend to be ortho-para directors while deactivating groups usually direct substitution to the meta position. Understanding these effects is crucial when planning sequential reactions in aromatic synthesis.

Retrosynthetic Analysis

This is a strategy of deconstructing a target molecule into simpler precursor structures. In a multi-step synthesis from benzene, retrosynthetic analysis helps identify key bonds to break and the sequence of reactions required to assemble the final structure, guiding the selection of starting materials and reaction conditions.

Transcript

00:01 All right.

00:01 So you have this parinitrobenzoic acid as a product.

00:06 And they're just asking you to make it.

00:08 And it's going to take more than one step.

00:10 So how are we going to do that? so you might notice that the substituents are para to each other.

00:20 Yet if you, as soon as you add one of those groups, they're both going to be meta directing.

00:27 And you may also notice that that that that that that that.

00:30 That.

00:31 Hydroxy, sorry, you don't know of a way to just directly add a carboxylic acid to a benzene ring, right? you know how to oxidize an alcohol chain.

00:41 That's the only way you know how to get a carboxic acid onto a benzene ring is by oxidizing benzylic hydrogens using potassium per manganate.

00:51 So that might be what we have to do here, right? so we have to end up with that nitro group in the meta position, sorry, in the paraposition.

00:58 And if we add the nitro group first, now the ring is deactivated to frito craps.

01:06 So chances are we have to add an alcohol group first.

01:10 So just for the sake of product formation, i'm going to favor the paraposition of nitro.

01:17 I'm going to favor nitration at the paraposition by putting a bulky alcohol group on the ring first...

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