Concept · chemistry
Organic synthesis
Follow Organic synthesis — see important new research and changes in evidence.Change log
What changed
Dated edits to this page's evidence: studies added or removed from a claim, claims added or withdrawn, and new explanations tagged here. Rewordings are not listed.
- Concept page published
Organic synthesis is the planned construction of carbon frameworks by forming and breaking bonds, usually judged by yield, selectivity and characterisation of isolated products.
Undergraduates live in this course: the reaction on the page is only as real as the molecule you can isolate.
Evidence
What the evidence shows
Drawn from 7 studies in this library. Each finding starts with a plain-language takeaway, then the denser detail. Supports means evidence for a finding; Challenges means evidence against a stated position; Qualifies marks scope with a short note on each study’s contribution. Challenged positions are labeled — they are not findings.
This library holds 7 empirical chemistry papers on organic synthesis with isolated findings, rates or spectra rather than reviews.
A bulky aryl-PPCl diphosphene is isolated as a monomer, swapped to Br and I, and shown to have a P=P double bond unlike diazonium chlorides.
Meta-linked squaramide macrocycles bind SO42− so tightly in wet DMSO that NMR cannot measure Ka, and they still select sulfate in 50% water.
Ethyl arylazocarboxylates plus iron phthalocyanine and air replace stoichiometric DEAD in Mitsunobu esterifications with high inversion.
PhC(O)SH plus Ir(ppy)3 switches photoredox arylation from N-methyl C–H to the benzylic position, giving 1,1-diarylmethylamines in hours.
Open questions
Tensions and limits
Some items are genuine disagreements on the same question. Others mark different assays, populations, or outcomes — limits on how far one study travels — not a forced fight between papers.
A high yield on one substrate is not a general method, and many 'new reactions' are still one-pot screens rather than mechanism-complete syntheses.
Study Role Design N Population Outcome Isolating rare arylhalodiphosphene P=P–X bonds Supports OtherSynthesis, SC-XRD, and DFT of thermally robust arylhalodiphosphenes and halide exchanges Main-group synthesis/structure study — no sample N Arylhalodiphosphene compounds and silver coordination complexes P=P bonding metrics and E/Z preferences across halide series Squaramide macrocycles that prefer sulfate in water Supports OtherSynthesis and aqueous NMR titration of squaramide macrocycles for sulfate recognition Anion-receptor binding study — no sample N Macrocyclic squaramide receptors in water/DMSO mixtures Sulfate binding affinity and selectivity versus competing anions
Common misconceptions
New reactions always work on every substrate.
Scope, yield and characterisation are empirical and often narrow.
Exam-style questions
Short-answer questions that ask you to explain or compare, not recall.
What does organic synthesis mean in this chemistry library?
Organic synthesis is the planned construction of carbon frameworks by forming and breaking bonds, usually judged by yield, selectivity and characterisation of isolated products.
Name one empirical finding from the organic synthesis papers.
A bulky aryl-PPCl diphosphene is isolated as a monomer, swapped to Br and I, and shown to have a P=P double bond unlike diazonium chlorides.
What is a limit of organic synthesis evidence here?
A high yield on one substrate is not a general method, and many 'new reactions' are still one-pot screens rather than mechanism-complete syntheses.
The studies
7 studies in this library bear on Organic synthesis, ordered by citations.
- SET/HAT flips benzylamine C–H arylation site
PhC(O)SH plus Ir(ppy)3 switches photoredox arylation from N-methyl C–H to the benzylic position, giving 1,1-diarylmethylamines in hours.
- Squaramide macrocycles that prefer sulfate in water
Meta-linked squaramide macrocycles bind SO42− so tightly in wet DMSO that NMR cannot measure Ka, and they still select sulfate in 50% water.
- Gold C–N/C–O coupling without extra oxidants
Cyclometalated gold catalyzes aryl C–N and C–O coupling in air/water by Au(I)/Au(III) oxidative addition, without sacrificial I(III) or F+ oxidants.
- Catalytic Mitsunobu chemistry with recyclable azo reagents
Ethyl arylazocarboxylates plus iron phthalocyanine and air replace stoichiometric DEAD in Mitsunobu esterifications with high inversion.
- DOS fragments grow hits in several directions at once
A modular diversity-oriented fragment library gave crystallographic hits on several proteins and then short, cheap sequences to many analogues, including a first covalent PBP3 fragment.
- A higher-yield route to FP–PEG–biotin ABPP probe
Reworking Cravatt’s FP–PEG–biotin synthesis cuts chromatography and raises overall yield from 1% to 28.5%.
- Isolating rare arylhalodiphosphene P=P–X bonds
A bulky aryl-PPCl diphosphene is isolated as a monomer, swapped to Br and I, and shown to have a P=P double bond unlike diazonium chlorides.
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