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

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Text this: Intramolecular Conjugate Ene Reaction of γ-Difluoromethyl- and γ-Trifluoromethyl-α,β-Unsaturated γ-Butyrolactones