Show how 1 -butanol can be converted into the following compounds: a. CH3 CH2 CH2 CH2 Br c.

step 1 Okay, so we want to create the following compounds from one butanol. So the first is one bramobu

Show how 1 -butanol can be converted into the following...

Show how 1 -butanol can be converted into the following compounds: $$\text { a. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}$$ $$\text { c. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OCH}_{3}$$ $$\text { d. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NHCH}_{2} \mathrm{CH}_{3}$$ e. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{SH}$ f. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{N}$

Show how 1 -butanol can be converted into the following compounds: $$\text { a. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Br}$$ $$\text { c. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OCH}_{3}$$ $$\text { d. } \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{NHCH}_{2} \mathrm{CH}_{3}$$ e. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{SH}$
f. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{C} \equiv \mathrm{N}$

Key Concepts

Alcohol Activation and Leaving Group Conversion

In organic synthesis, the hydroxyl group of an alcohol is a poor leaving group. Converting it into a better leaving group—often by reacting with hydrogen halides (like HBr) or sulfonyl chlorides (such as tosyl chloride)—enables efficient nucleophilic substitution. This concept is fundamental when transforming alcohols into a wide variety of compounds by facilitating the displacement of the transformed leaving group by different nucleophiles.

Nucleophilic Substitution (SN2 Mechanism)

Nucleophilic substitution reactions, particularly the SN2 mechanism, involve a one-step concerted process where a nucleophile attacks an electrophilic carbon, displacing the leaving group. This reaction is key to synthesizing alkyl halides, ethers, amines, thiols, and nitriles from activated alcohol derivatives. The SN2 mechanism is especially important for primary substrates due to its stereospecific and backside attack nature.

Williamson Ether Synthesis

The Williamson ether synthesis is a classic method for forming ethers which involves reacting an alkoxide ion with a primary alkyl halide. This strategy highlights the use of deprotonated alcohols (alkoxides) as nucleophiles to attack electrophilic carbons, thereby constructing ether bonds. It is a powerful tool for creating a diverse range of ether compounds in organic chemistry.

Use of Specific Nucleophiles for Group Interconversion

Transforming an activated alcohol into various functional groups relies on the use of appropriate nucleophiles—such as halide ions, alkoxides, amines, thiolates, and cyanide ions. Each nucleophile, when reacted with a suitably activated substrate, leads to a different product. This approach underscores the versatility of nucleophilic substitution processes in constructing molecules with varied functionalities, an essential strategy in synthetic organic chemistry.

Transcript

00:01 Okay, so we want to create the following compounds from one butanol.

00:07 So the first is one bramobutane.

00:24 So we can react this with pbr3.

00:29 And if we had a chiral center, we'd get inversion of stereochemistry.

00:35 For b, we're going to add a methoxy group.

00:41 So we use williamson ether synthesis.

00:43 And first react this with sodium hydroxide to deperinate the hydrogen.

00:51 And this is followed by an aquilite.

00:53 We need one carbon for the methoxy group so reacts with methyl bromide for c we want to create this amod so we can react the primary amine with a ketin and then a ketitin or an aldohad and reduce it with sodium cyanide or sodium cyanide so we're first going to turn the alcohol into an aldahad by reacting with a mild oxidizing agent because we have a primary alcohol we can use pcc or dezmartin periodine and and so now we have an aldahide.

01:42 I're reacting with ethylamine.

01:52 Now reducing with sodium cyanideoborhydroid.

02:00 So we went from the structure to this one right here.

02:18 And if you just like turn it a different way, it's the same thing as the product.

02:28 For d, we want to create, we want to add a nitro group.

02:40 So this can be done by reacting sodium cyanide.

02:44 Or sodium cyanide with an aquahelide.

02:48 So we're going to turn the alcohol into an aquahelide...