chemistry

Perfosfamide

Perfosfamide 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 Perfosfamide rather than just read about it. In short: Perfosfamide, or 4-hydroperoxycyclophosphamide (trade name Pergamid) was an experimental drug candidate for blood cancers that was rejected by the FDA in 1993 and never reached the market. Intended use Perfosfamide was used experimentally by oncologists in the 1980s for use in bone marrow transplant procedures for treatment of blood cancers.

Key takeaways

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

Reference excerpt

Perfosfamide, or 4-hydroperoxycyclophosphamide (trade name Pergamid) was an experimental drug candidate for blood cancers that was rejected by the FDA in 1993 and never reached the market.

Intended use Perfosfamide was used experimentally by oncologists in the 1980s for use in bone marrow transplant procedures for treatment of blood cancers. It was added to the tissue after it had been taken from the donor but before the tissue was administered to the patient to "purge" lymphocytes in order to prevent Graft Versus Host Disease, which results from donor lymphocytes attacking normal host cells and tissues, and to "purge" a patient's own (autologous) collected hematopoietic stem cells of any malignant cells it may still contain at the time of harvesting. In 1989 Nova Pharmaceutical took over development of the compound and in 1992, it submitted a new drug application to the FDA for using perfosamide to purge malignant cells in transplants for the treatment of acute myeloid leukemia. In the ensuing year, it merged with Scios to become Scios Nova. In March 1993, the FDA's Oncology Drugs Advisory Committee rejected the application because all the data was from the experimental uses, and no randomized clinical trial had been conducted. At the review meeting, Scios Nova also announced that it would not fund further development of the drug candidate.

Chemistry Perfosfamide is an oxazaphosphorine compound, similar to mafosfamide and cyclophosphamide. Like those compounds it, is metabolized to 4-hydroxycyclophosphamide, which eventually gives rise to the two directly cytotoxic metabolites — phosphoramide mustard and acrolein.

References

Illustrations

Worked examples

Example 1 — a first encounter with Perfosfamide

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

In research: Perfosfamide 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 Perfosfamide 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: Perfosfamide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Abandoned drugs, Chloroethyl compounds, Hydroperoxides, so understanding it makes those chapters shorter.
In everyday life: Look for Perfosfamide 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 Perfosfamide in 20 minutes

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

Frequently asked questions

What is Perfosfamide in simple terms?

Perfosfamide, or 4-hydroperoxycyclophosphamide (trade name Pergamid) was an experimental drug candidate for blood cancers that was rejected by the FDA in 1993 and never reached the market. Intended use Perfosfamide was used experimentally by oncologists in the 1980s for use in bone marrow transplan…

Why does Perfosfamide 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 Perfosfamide?

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 Perfosfamide.