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| || | ||   / _ \\  | |  | || | || | ||  /_   _// 
| '--' ||  / //\ \\ | |/\| || | || | ||    | ||   
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|_|| |_|| |_||  |_|||_// \_||  \____//   /__//    
`-`  `-`  `-`   `-` `-`   `-`   `---`    `--`

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Text this: γ-Regioselectivity of lithiated 2-buten-4-olide towards aromatic aldehydes: A simple synthesis of γ-arylidenebutenolides