Total Synthesis Strategies in Organic Chemistry

Total synthesis lies at the heart of modern organic chemistry, uniting retrosynthetic logic with inventive bond‐forming tactics to build complex natural and designed molecules from simple precursors. Traditional linear approaches, in which one end of a molecule is elaborated step by step, have in many cases given way to convergent and modular designs that assemble multiple fragments in parallel, reducing step counts and improving overall yield. Central to these advances are a range of catalytic methods—palladium- and nickel-catalysed cross-couplings, ruthenium- and molybdenum-catalysed metathesis reactions, gold-catalysed cyclisations and organocatalytic stereocentre installation—that enable precise control of connectivity and stereochemistry. Macrocyclisation, once deemed a formidable entropic challenge, has been tamed by ring-closing alkyne and alkene metathesis, macrolactonisation and strategic intramolecular reactions. Cascade and tandem sequences further accelerate complexity generation, allowing multiple rings and stereogenic centres to form in a single operation. Divergent and diverted synthesis strategies exploit common intermediates to access families of analogues, underpinning applications in drug discovery, agrochemicals and material science. Recent work emphasises sustainability, utilising earth-abundant metals, flow methodologies and biocatalytic elements. Together, these innovations continue to expand the frontiers of chemical space, reinforcing total synthesis as both an art form and a key enabler of molecular innovation.

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Total Synthesis Strategies in Organic Chemistry publication trend

The graph below shows the total number of articles in total synthesis strategies in organic chemistry across all publications each year (not limited to Nature Index journals).

Technical terms

Total synthesis: Complete chemical construction of a complex molecule from simple precursors.

Convergent synthesis: Strategy in which molecular segments are prepared independently and then joined.

Macrocyclisation: Formation of large ring structures, often challenging due to entropic and strain factors.

Alkyne metathesis: Metal-catalysed exchange of alkyne bonds to form new carbon–carbon connections, including ring closure.

Diverted total synthesis: Approach that diverges from a common intermediate to generate multiple analogues.

References

1. Collective and Diverted Total Synthesis of the Strasseriolides: A Family of Macrolides Endowed with Potent Antiplasmodial and Antitrypanosomal Activity. Angewandte Chemie International Edition (2024).
2. Total Syntheses of Nominal and Actual Prorocentin. Journal of the American Chemical Society (2023).
3. Lessons from Natural Product Total Synthesis: Macrocyclization and Postcyclization Strategies. Accounts of Chemical Research (2021).