chemistry

Minaprine

Minaprine is a chemistry topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Minaprine rather than just read about it. In short: Minaprine (INNTooltip International Nonproprietary Name, USANTooltip United States Adopted Name, BANTooltip British Approved Name), sold under the brand name Cantor among others, is a monoamine oxidase inhibitor antidepressant drug that was used in France for the treatment of depression until it was withdrawn from the market in 1996 because it caused convulsions. Pharmacology Pharmacodynamics Minaprine is a monoamin…

Key takeaways

Minaprine belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Minaprine to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Minaprine from memory before moving on to harder problems.

Reference excerpt

Minaprine (INNTooltip International Nonproprietary Name, USANTooltip United States Adopted Name, BANTooltip British Approved Name), sold under the brand name Cantor among others, is a monoamine oxidase inhibitor antidepressant drug that was used in France for the treatment of depression until it was withdrawn from the market in 1996 because it caused convulsions.

Pharmacology

Pharmacodynamics Minaprine is a monoamine oxidase inhibitor (MAOI). A study found that it acts as a reversible inhibitor of MAO-A (RIMA) in rats, albeit with very low potency. In addition to its RIMA activity, minaprine has been found to act as a weak antagonist of the serotonin 5-HT2B receptor (Ki = 863 nM). It has also been found to weakly inhibit acetylcholinesterase in rat brain (striatum) homogenates. It has demonstrated significant antibiotic activity against M. chelonae and M. abscessus in tests with antibiotic resistant bacteria.

Chemistry

Synthesis The first synthesis of minaprine was disclosed in patents published in 1979.

The final step is the reaction between a chloro-substituted pyridazine and the primary amine group of a morpholine derivative. The required pyridazine can be made by the reaction of acetophenone and pyruvic acid, followed by ring formation using hydrazine, giving a pyrazidinone. Treatment of this with phosphoryl chloride converts it to the required chloro derivative.

Analogues Close analogues of minaprine acting as selective serotonin 5-HT2B receptor antagonists such as MW071 and MW073 have been described.

References

Illustrations

Worked examples

Example 1 — a first encounter with Minaprine

Start with the simplest possible case. Write down what Minaprine claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In chemistry, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Minaprine before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Minaprine ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Minaprine

In research: Minaprine appears in chemistry research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Minaprine in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Minaprine is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Morpholinyl compounds, 5-HT2B antagonists, Acetylcholinesterase inhibitors, so understanding it makes those chapters shorter.
In everyday life: Look for Minaprine outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Minaprine in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Minaprine means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Minaprine out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Minaprine in simple terms?

Why does Minaprine matter?

Because it connects several chemistry ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Minaprine?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Minaprine.