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Borane-Trimethylamine Complex: A Versatile Reagent in Organic Synthesis
1Dipartimento di Chimica, Università Degli Studi di Milano, Via Golgi 19, 20133 Milan, Italy.
Borane-trimethylamine complex (BTM) is a stable and cost-effective reagent for organic synthesis. This review highlights its diverse applications, including reductions, methylations, and novel uses in CO2 utilization and radical chemistry.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
Background:
- Borane-trimethylamine complex (Me3N·BH3; BTM) is a stable, cost-effective amine-borane complex.
- It is widely used in organic synthesis for various reduction reactions.
Purpose of the Study:
- To provide a comprehensive review of BTM applications in organic synthesis.
- To cover recent and innovative uses not previously reviewed.
Main Methods:
- Literature review of BTM applications in organic synthesis.
- Focus on reductions, methylations, acetal cleavage, CO2 utilization, and radical chemistry.
Main Results:
- BTM is effective for carbonyl and C=N bond reductions (oximes, hydrazones, azines).
- It facilitates transfer hydrogenation of N-heterocycles, N-monomethylation of anilines, nitrobenzene reduction, and N-tritylamine deprotection.
- BTM is key in regioselective cyclic acetal cleavage and has emerging roles in CO2 utilization and photocatalytic radical chemistry.
Conclusions:
- Borane-trimethylamine complex is a versatile reagent with expanding applications in organic synthesis.
- Its utility spans traditional reductions to innovative green chemistry approaches.
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