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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