By S.L. Schreiber
Quantity 1 offers an in depth survey of reactions that entail the 1,2-addition of nonstabilized carbanion equivalents of carbonyl, imino and thiocarbonyl performance. Emphasis has been put on these reagents that lead to hugely selective addition reactions. tools are suggested to choose, for instance, one carbonyl team over one other within the similar molecule, or so as to add preferentially a fraction to at least one (enantiotopic of diastereotopic) face of a carbonyl crew. approaches that end result from an preliminary addition to the C=X practical crew, for instance alkenations and rearrangements, also are coated during this quantity.
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Additional info for Additions to C-X &pgr;-Bonds, Part 1, Volume 1
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Moreover, it allows for facile recycling of the polymer support for further use once the final carbohydrate assemblage is cleaved from the resin. 4 Polymer support silylene linking method for hindered hydroxyl-bearing glycals. 5 Glycals loaded via silylene linkage. mono-halogenated counterpart. This differential in reactivity allows for a single linkage of more sterically demanding systems in the first stage, while discouraging 2-fold silylation (see 11→12). A more reactive nucleophile, such as a primary alcohol, even if polymer bound, can now join at the less active remaining silylating site.
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Additions to C-X &pgr;-Bonds, Part 1, Volume 1 by S.L. Schreiber