A formal [4+3] epoxide cascade protocol utilizing ambiphilic sulfonamides and a variety of epoxides (masked ambiphiles) has been developed for the generation of benzothiaoxazepine-1,1'-dioxides and oxathiazepine-1,1'-dioxides. This protocol combines an epoxide ring-opening with either an S(N)Ar or oxa-Michael cyclization pathway.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2864497 | PMC |
| http://dx.doi.org/10.1021/ol100035e | DOI Listing |
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