science

Indazole

Indazole is a science 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 Indazole rather than just read about it. In short: Indazole, also called isoindazole, is a heterocyclic aromatic organic compound. This bicyclic compound consists of the fusion of benzene and pyrazole.

Key takeaways

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

Reference excerpt

Indazole, also called isoindazole, is a heterocyclic aromatic organic compound. This bicyclic compound consists of the fusion of benzene and pyrazole. Indazole is an amphoteric molecule which can be protonated to an indazolium cation or deprotonated to an indazolate anion. The corresponding pKa values are 1.04 for the equilibrium between indazolium cation and indazole and 13.86 for the equilibrium between indazole and indazolate anion. Indazole derivatives display a broad variety of biological activities. Indazoles are rare in nature. The alkaloids nigellicine, nigeglanine, and nigellidine are indazoles. Nigellicine was isolated from the widely distributed plant Nigella sativa L. (black cumin). Nigeglanine was isolated from extracts of Nigella glandulifera. The Davis–Beirut reaction can generate 2H-indazoles. Indazole, C7H6N2, was obtained by E. Fischer (Ann. 1883, 221, p. 280) by heating ortho-hydrazine cinnamic acid,

Drugs made from Indazole Benzydamine, commonly branded as Tantum Verde and Difflam, is the most well known Indazole derivative. It is a nonsteroidal anti-inflammatory, with local anaesthetic and analgesic properties for pain relief and anti-inflammatory treatment of inflammatory conditions of the mouth and throat.

See also Indole, an analog with only one nitrogen atom in position 1. Benzimidazole, an analog with the nitrogen atoms in positions 1 and 3. Simple aromatic rings 7-Nitroindazole, an indazole-based nitric oxide synthase inhibitor

References

Synthesis: Stadlbauer, W. (2002). "Product Class 2: 1H- and 2H-Indazoles". In Neier; Bellus (eds.). Category 2, Hetarenes and Related Ring Systems. Science of Synthesis. Houben-Weyl. doi:10.1055/sos-SD-012-00277. ISBN 9783131122711. Review: Schmidt, Andreas; Beutler, Ariane; Snovydovych, Bohdan (2008). "Recent Advances in the Chemistry of Indazoles". European Journal of Organic Chemistry. 2008 (24): 4073–4095. doi:10.1002/ejoc.200800227.

Illustrations

Worked examples

Example 1 — a first encounter with Indazole

Start with the simplest possible case. Write down what Indazole claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Indazole 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 Indazole 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 Indazole

In research: Indazole appears in science 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 Indazole 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: Indazole is common in secondary-school and first-year university syllabi. It links to neighbouring topics CYP2E1 inhibitors, Indazoles, Simple aromatic rings, so understanding it makes those chapters shorter.
In everyday life: Look for Indazole 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 Indazole in 20 minutes

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

Frequently asked questions

What is Indazole in simple terms?

Indazole, also called isoindazole, is a heterocyclic aromatic organic compound. This bicyclic compound consists of the fusion of benzene and pyrazole.

Why does Indazole matter?

Because it connects several science 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 Indazole?

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 Indazole.