chemistry

SHA-68

SHA-68 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 SHA-68 rather than just read about it. In short: SHA-68 is a drug which acts as a selective, non-peptide antagonist at the neuropeptide S receptor NPSR. In animal studies it reduced motor stereotypes, and blocks the stimulant action of neuropeptide S.

Key takeaways

SHA-68 belongs to chemistry; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SHA-68 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SHA-68 from memory before moving on to harder problems.

Reference excerpt

SHA-68 is a drug which acts as a selective, non-peptide antagonist at the neuropeptide S receptor NPSR. In animal studies it reduced motor stereotypes, and blocks the stimulant action of neuropeptide S.

Synthesis The synthesis of SHA-68 was shown in a patent (ref example 1, Ex 1, Ex 2, Ex 16).

The Grignard reaction between Methyl 2-piperazine carboxylate [2758-98-7] (1) and phenylmagnesium bromide [100-58-3] (2) occurs to give alpha,alpha-Diphenyl-2-piperazinemethanol [17532-20-6] (3). {This compound is called Azapipradrol}. Protection of the sterically more accessible piperazine nitrogen with Boc anhydride occurs to give PC23122074 (4). Treatment with ethyl chloroformate [541-41-3] (5) gives the cyclic urethane and hence, PC68420957 (6). Deprotection of the Boc group in the presence of trifluoroacetic acid gave 1,1-Diphenyltetrahydro-1H-oxazolo[3,4-a]pyrazin-3(5H)-one [847555-93-5] [847556-28-9] (7). Lastly, treatment with 4-fluorophenyl isocyanate [1195-45-5] (8) gave the substituted urea, thus completing the synthesis of SHA-68 (9). SAR reveals similarity to RTI-118 and contains the same precursor.

Illustrations

Worked examples

Example 1 — a first encounter with SHA-68

Start with the simplest possible case. Write down what SHA-68 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 SHA-68 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 SHA-68 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 SHA-68

In research: SHA-68 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 SHA-68 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: SHA-68 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 4-Fluorophenyl compounds, Drugs not assigned an ATC code, Oxazoles, so understanding it makes those chapters shorter.
In everyday life: Look for SHA-68 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 SHA-68 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SHA-68 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 SHA-68 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SHA-68 in simple terms?

Why does SHA-68 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 SHA-68?

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 SHA-68.