Search results for: 2-AMINODIENES

• A Novel [4+2] Cycloaddition Reaction Involving Lawesson’s Reagent. Structure and Specific Fragmentations of a New Cyclic 1,2-Thiaphosphinane-4-one

  Publication

  • W. Przychodzeń
  • B. Kusznierewicz

  - PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS - Year 2023

  A crude morpholine enamine of acetone treated with Lawesson’s reagent unexpectedly yielded a six-membered thiaphosphinane-4-one. This compound is the first example of a new class of heterocycles. It has been proven that it is formed from 4-methyl-2-morpholino-1,3-pentadiene which is usually present in crude morpholine enamine batches. A mechanism of this regioselective reaction was postulated and a characteristic chair-like conformation...

  Full text to download in external service