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- W4230558246 abstract "Abstract The synthesis of a series of 5‐(alkynyl) dibenzothiophenium triflates, prepared from dibenzo[b,d]thiophene 5‐oxide and the corresponding trimethylsilyl‐substituted alkynes is reported. Their structures were determined by X‐ray crystallography, and their reactivities as electrophilic alkynylation reagents evaluated. Their broad substrate scope and functional‐group tolerance illustrate their potential to become an alternative to the broadly used EBX reagents. Isotope labeling studies reveal that alkynyldibenzothiophenium salts may undergo attack by nucleophiles at either the α‐ or β‐carbon atom depending on the nature of their substitution pattern. Subsequent elimination of the dibenzothiophene unit and 1,2‐migration of one of the groups (in case of β‐attack) affords the desired alkynes." @default.
- W4230558246 created "2022-05-11" @default.
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- W4230558246 date "2018-08-27" @default.
- W4230558246 modified "2023-10-14" @default.
- W4230558246 title "5-(Alkynyl)dibenzothiophenium Triflates: Sulfur-Based Reagents for Electrophilic Alkynylation" @default.
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- W4230558246 doi "https://doi.org/10.1002/ange.201807418" @default.
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