Making a liquid that attracts biting insects (1-octen-3-ol)

TL;DR

The video demonstrates the process of synthesizing 1-octen-3-ol, a chemical attractive to biting insects, through an aldol reaction and MPV reduction.

Transcript

Today we're finally making 1-octen-3-ol which is something I've been trying to make for a while now. It's sometimes used as an artificial mushroom flavor but what I find interesting is that it's a chemical attractive for biting insects. It's naturally present in both human sweat and breath and this is one major way for insects like mosquitoes to fi... Read More

Key Insights

• 😰 1-Octen-3-ol is a compound naturally present in human sweat and breath, and it serves as an attractant for biting insects.
• 🤣 The synthesis of 1-octen-3-ol involves an aldol reaction, which forms an intermediate compound, 1-octen-3-one, and a subsequent MPV reduction to convert it into 1-octen-3-ol.
• 🤩 Formaldehyde and 2-heptanone are key chemicals used in the aldol reaction, while aluminum isopropoxide serves as the catalyst in the MPV reduction.
• 😘 The yield of the synthesis process was low, resulting in only around 0.5 grams of product with a crude yield of approximately 2%.
• 🤣 It is possible to purchase 1-octen-3-ol from a perfume site rather than synthesizing it, making the synthesis process somewhat redundant.

Questions & Answers

Q: What is 1-octen-3-ol used for?

1-octen-3-ol is commonly used as an artificial mushroom flavor and is naturally present in human sweat and breath. It acts as an attractant for biting insects, such as mosquitoes.

Q: Why did the initial method of synthesis fail?

The initial method using the acrolein-bromopentane route failed due to the polymerization of acrolein before it could be used. The video then introduces an alternate route involving an aldol reaction and MPV reduction.

Q: What are the chemicals used in the aldol reaction?

The chemicals used in the aldol reaction are formaldehyde and 2-heptanone, both purchased online. Formaldehyde is relatively inexpensive, while 2-heptanone is more expensive, costing $70.

Q: What is the purpose of the MPV reduction?

The MPV reduction is used to convert the intermediate compound, 1-octen-3-one, obtained from the aldol reaction, into the desired product, 1-octen-3-ol. The reduction involves the use of aluminum isopropoxide as a catalyst.

Summary & Key Takeaways

• The video showcases the synthesis of 1-octen-3-ol, a compound found in human sweat and breath and attractive to biting insects.

• The synthesis involves an aldol reaction and condensation, followed by a Meerwin-Pondorff-Veerley reduction.

• Chemicals used include formaldehyde, 2-heptanone, sodium hydroxide, and aluminum isopropoxide.