The intramolecular, stereoselective addition of sulfoximine carbanions to α,β-unsaturated esters

Article abstract of DOI:10.1021/ja034744z

ortho-Bromocinnamates can be coupled with methyl phenylsulfoximine to afford N-arylsulfoximines in excellent yield. Treatment of these products with an amide base results in a completely stereoselective cyclization to afford enantiomerically pure benzothiazines. This reaction is stereospecific.