chemistry

Indacrinone

Indacrinone 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 Indacrinone rather than just read about it. In short: Indacrinone is a loop diuretic. It can be used in patients of gout with hypertension as an antihypertensive because it decreases reabsorption of uric acid, while other diuretics increase it.

Key takeaways

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

Reference excerpt

Indacrinone is a loop diuretic. It can be used in patients of gout with hypertension as an antihypertensive because it decreases reabsorption of uric acid, while other diuretics increase it.

Chirality and biological activity

Indacrinone is a chiral drug, with one chiral center and hence exists as mirror-image twins. (R)-enantiomer, the eutomer, is diuretic whereas the mirror-image version (S)-enantiomer counteracts side effect of the eutomer. Here both the enantiomers contribute to the overall desired effect in different ways. As indicated earlier, the (R)- enantiomer is the pharmacologically active diuretic. Like most other diuretics, the (R)-isomer possesses an undesirable side-effect of retaining uric acid. But the (S)-enantiomer, the distomer, has the property of assisting uric acid secretion (uricosuric effect), and, therefore, antagonizing the undesirable side-effects of the eutomer (uric-acid retention). It affords a good argument for the marketing of a racemic mixture. But studies exemplify that 9:1 mixture of the two enantiomers provides optimal therapeutic value.

Synthesis

The Friedel-Crafts acylation of 2,3-dichloroanisole [1984-59-4] (1) with phenylacetyl chloride [103-80-0] (2) gives 2,3-dichloro-4-phenylacetylanisole [59043-83-3] (3). A variation of the Mannich reaction is performed employing tetramethyldiaminomethane [51-80-9] (this is an aminal of dimethylamine and formaldehyde). The intermediate reaction product (5), which is not isolated, would undergo a β-Hydride elimination with concomitant loss of dimethylamine and formation of the corresponding enone, 2,3-Dichloro-4-(2-phenylacryloyl)anisole (PC10924810) (6). Acid catalyzed (H2SO4) intramolecular cyclization gives the indanone (PC10990444) (7). This is O-demethylated under acidic conditions to give 2-Phenyl-5-hydroxy-6,7-dichloro-1-indanone, PC12774089 (8). The phenol thus obtained is then alkylated on oxygen by iodoacetic acid [64-69-7] (9) affording PC20520826 (10). Alkylation with iodomethane [74-88-4] in the presence of sodium hydride completed the synthesis of indacrinone (11).

See also Chiral drugs Chirality Eudisimic ratio

References

Illustrations

Worked examples

Example 1 — a first encounter with Indacrinone

Start with the simplest possible case. Write down what Indacrinone 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 Indacrinone 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 Indacrinone 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 Indacrinone

In research: Indacrinone 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 Indacrinone 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: Indacrinone is common in secondary-school and first-year university syllabi. It links to neighbouring topics Carboxylic acids, Cardiovascular system drug stubs, Chloroarenes, so understanding it makes those chapters shorter.
In everyday life: Look for Indacrinone 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 Indacrinone in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Indacrinone 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 Indacrinone out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Indacrinone in simple terms?

Indacrinone is a loop diuretic. It can be used in patients of gout with hypertension as an antihypertensive because it decreases reabsorption of uric acid, while other diuretics increase it.

Why does Indacrinone 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 Indacrinone?

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 Indacrinone.