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

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Text this: Carbene-catalyzed selective addition of isothioureas to enals for access to sulphur-containing 5,6-dihyropyrimidin-4-ones