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The discovery of the novel reactivity of conjugated enynes, mediated by readily available halogenation reagents, opens a broad range of mechanistically unique pathways for the synthesis of highly functionalized chiral allene derivatives. Bromoallenyl pyrrolidines can be synthesized via 1,4-addition of sulfonamide nitrogen nucleophiles and halogens to conjugated enynes. This process can lead to simultaneous...
Novel C-17-chloro-substituted derivative of vinorelbine or vinflunine has been regio-selectively synthesized via the chlorination reaction in the presence of Lewis acid. The catalyst Cp2TiCl2 plays a key role in the chlorination reaction.
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