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• W2026083944 abstract "π-Allyltricarbonyliron lactone complexes, η4-dienetricarbonyliron complexes and their relatives offer an interesting approach to the problem of acyclic stereocontrol. Functional groups appended to the organic ligand frequently adopt a preferred conformation. This, combined with the steric bulk of the Fe(CO)3 moiety provides a means for controlling the addition of reagents to such pendant functionality in a defined manner. Thus addition of nucleophiles to aldehydes and ketones affords a route to diastereoisomerically pure secondary and tertiary alcohols while olefinic functionality in the side-chain can be utilised in stereoselective dihydroxylations, Diels–Alder and Michael addition reactions. Just as the formation of arene Cr(CO)3 complexes modifies reactivity at the α-position of arene substituents, the Fe(CO)3 group of η4-diene and trimethylenemethane tricarbonyliron complexes can be used to stabilise an adjacent positive charge. Trapping of the carbocation resulting from ionisation of an α-carbinol occurs with high diastereoselectivity, providing an unusual and useful stereoselective SN1-type reaction. Such highly stereoselective reactions have been put to good use in the preparation of a number of biologically interesting natural products." @default.
• W2026083944 created "2016-06-24" @default.
• W2026083944 creator A5001408657 @default.
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• W2026083944 date "1998-01-01" @default.
• W2026083944 modified "2023-10-14" @default.
• W2026083944 title "Tricarbonyliron complexes: an approach to acyclic stereocontrol" @default.
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• W2026083944 doi "https://doi.org/10.1039/a827301z" @default.
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