N-Bromosuccinimide-mediated reaction of cyclic styrenes with Chloramine-T (cas 127-65-1)
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Add time:09/10/2019 Source:sciencedirect.com
A facile route toward substituted allylic sulfonamides 3 is developed from the N-bromosuccinimide (NBS)-mediated allylic amination of cyclic styrenes 2 with chloramine-T (1a). Skeleton 2 is prepared by Grignard addition of cyclic ketones with different arylmagnesium bromides in THF followed by dehydration of the resulting tertiary alcohols with BF3·OEt2 in CH2Cl2. The synthetic route obtained moderate yields from the one-step operation and the key structures of skeleton 3 were confirmed by X-ray crystallographic analysis.
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