New Frontiers in Organosodium Chemistry as Sustainable Alternatives to Organolithium Reagents
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION(2024)
Abstract
With their highly reactive respective C-Na and N-Na bonds, organosodium and sodium amide reagents could be viewed as obvious replacements or even superior reagents to the popular, widely utilised organolithiums. However, they have seen very limited applications in synthesis due mainly to poor solubility in common solvents and their limited stability. That notwithstanding in recent years there has been a surge of interest in bringing these sustainable metal reagents into the forefront of organometallics in synthesis. Showcasing the growth in utilisation of organosodium complexes within several areas of synthetic chemistry, this Minireview discusses promising new methods that have been recently reported with the goal of taming these powerful reagents. Special emphasis is placed on coordination and aggregation effects in these reagents which can impart profound changes in their solubility and reactivity. Differences in observed reactivity between more nucleophilic aryl and alkyl sodium reagents and the less nucleophilic but highly basic sodium amides are discussed along with current mechanistic understanding of their reactivities. Overall, this review aims to inspire growth in this exciting field of research to allow for the integration of organosodium complexes within common important synthetic transformations. With demand for lithium soaring due to its escalating use in energy applications, the heavier organosodium compounds have started to be considered as alternatives in synthesis. Recent reports have tackled their solubility problems, tamed their high reactivity and studied their intermediates constitution, accessing now transformations that were not possible with organolithiums, and opening new vistas for the use of these organosodium reagents.image
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Key words
Alkali Metals,Metalation,Organometallic,Sodium,Sustainability
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