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 ______     _____     ____     __   __    _____   
|      \\  |  ___||  |  _ \\   \ \\/ //  / ____|| 
|  --  //  | ||__    | |_| ||   \ ` //  / //---`' 
|  --  \\  | ||__    | .  //     | ||   \ \\___   
|______//  |_____||  |_|\_\\     |_||    \_____|| 
`------`   `-----`   `-` --`     `-`'     `----`

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Text this: N-heterocyclic carbene-catalyzed atroposelective annulation for access to thiazine derivatives with C-N axial chirality