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1.2- Dithiocarbonyl compound

Dicyano-l,2-dithiete is an intermediate in the oxidation of the dianion of cis-2,3-dicyano-2,3-dimercaptoethylene 530 and related compounds.1,2-Dithietes are believed to be in equilibrium with 1,2-dithiocarbonyl compounds, as exemplified by 531. Several of these unstable 1,2-dithietes are observed by their electronic spectra at 77°K. Theoretical considerations indicate that the photochemical conversion of an a-dithione into a 1,2-dithiete is allowed the thermal process is forbidden. ... [Pg.627]

The in situ photochemical generation of 1,2-dithioketones and -aldehydes including dithioglyoxal, 3,3-dimethyl-2-thioxobutanethial, and camphor dithioquinone was confirmed by the subsequent trap of the 1,2-dithiocarbonyl compounds in [4 + 2] cycloadditions. The 1,2-dithioketones and 1,2-dithioaldehydes exhibited a preference for 4ir participation in inverse electron demand (LUMOdlene controlled) Diels-Alder reactions with electron-rich dienophiles (Scheme 8-X).37... [Pg.120]

The reactivity of the thiocarbonyl group of 1,2-dithiocarbonyl compounds is well suited for 2n participation in Diels-Alder reactions with typical dienes (Chapter 5). In addition, frequent and well-defined Diels-Alder reactions with 4tt participation of symmetrical 1,2-dithiocarbonyl compounds with olefinic and acetylenic dienophiles have been detailed.36-39... [Pg.299]

Dithiocarbonyl compounds such as dithio- or tetrathio-oxalates (30) served... [Pg.236]

See other pages where 1.2- Dithiocarbonyl compound is mentioned: [Pg.534]    [Pg.534]    [Pg.534]    [Pg.113]    [Pg.121]    [Pg.187]    [Pg.299]    [Pg.299]    [Pg.300]    [Pg.300]    [Pg.300]    [Pg.214]    [Pg.227]    [Pg.227]    [Pg.229]    [Pg.229]    [Pg.230]   
See also in sourсe #XX -- [ Pg.227 , Pg.228 , Pg.229 ]



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Dithiocarbonyl

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