825645-72-5Relevant articles and documents
A novel synthesis of spiro 1,3-dithiin and spiro 1,3-thiazine derivatives under Phase Transfer Catalysis (PTC) conditions
El-Saghier, Ahmed M. M.
, p. 1237 - 1250 (2004)
Ketene S,S-acetals 1a,b or ketene N,S-acetals 2a,b reacts in situ with a variety of ylidenemalononitriles to afford the desired spiro [1,3]dithiin heterocycles 3a,b-11a,b or spiro[1,3/thiazine heterocycles 12a,b-20a,b. Treatment of 2-(1-acetyl-2-oxopropyl