- Thioketene Syntheses, VIII. - Thioketenes by Cycloreversion of 1,3-Dithiolane Derivatives
-
2-Alkylidene-1,3-dithiolanes are transformed into S,S-dioxides 1 and S-ethyl- 2 or S-arylsulfonium salts 3.After deprotonation at C-5 they form in a cycloreversion thioketenes 5, which can be trapped as thioamides 17, 18.The stabilized thioketenes 5e,i-k afford 1:1 cycloadducts 24a, b, 27a-d with azomethines; in addition, thioketene 5j provides a dimer 28j, which was characterized by an X-ray structural investigation.
- Schaumann, Ernst,Scheiblich, Stefan,Wriede, Ulrich,Adiwidjaja, Gunadi
-
p. 1165 - 1176
(2007/10/02)
-
- 1-Cyanoalkylidene-substituted 1,3-Dithietanones as Cyanothioketene Equivalents. Conversion into 1,3,5-Dithiazin-4-ones and 2-Azetidinethiones
-
Thiolation of 3,3-dichloroacrylonitriles 1 leads to dithiolates 3, which can be alkylated to give ketene dithioacetals 5 or acylated with phosgene to yield the title compounds 8. tert-Butyl(cyano)thioketene (9c) formed via cycloreversion of 8c was f
- Schaumann, Ernst,Wriede, Ulrich,Adiwidjaja, Gunadi
-
p. 2205 - 2225
(2007/10/02)
-