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

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Text this: Formal [4+2]-annulation of vinyl azides with N-unsaturated aldimines