Abstract
The synthetic uses of acyclic butadiene-iron tricarbonyl complexes are reviewed. The main advantages of these organometallic reagents include their easy access (even in chiral form), the efficiency of the Fe(CO)3 moiety in protecting 1,3-dienes, and its use as a stereodirecting group in various types of reactions. Furthermore, these complexes lead to many polyfunctionalized, eventually optically active, dienes which are themselves of much current interest in organic synthesis. 1. Introduction 2. Preparation and Properties of Chiral Acyclic Butadiene-Iron Tricarbonyl Complexes 3. Reaction Occurring on the Organometallic Moiety 4. The Organometallic Complex as a Protecting and Stereodirecting Group 5. Conclusions

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