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A-Ketoketene mercaptals

Photosensitized oxygenation of a-ketoketene mercaptals has been described and these give dioxetanols, which subsequently collapse to carboxylic acids. Photo-oxidation of the mesoionic compounds (63) and (64) gives ring-cleavage products via endoperoxides and irradiation of tetrathiatetracene and of its selenium analogue in halocarbon solvents leads to radical cation salts. [Pg.419]

Without additional reagents C-Acylation with mercaptan elimination a-Ketoketene mercaptals from trithioorthocarboxylic acid esters... [Pg.228]

Bis(alkylthio)pyridines from a-ketoketene mercaptals via p-cyano-a-hydroxyketene mercaptals... [Pg.394]

Organolithium compds. [s.a. under Me2AlN(Me)Ph] 1,2-Addition to a-ketoketene mercaptals s. 44, 494... [Pg.403]

Acylene-1,1-dithiols a-Ketoketene mercaptals a- Dimercaptomethy leneketones 15... [Pg.550]

See other pages where A-Ketoketene mercaptals is mentioned: [Pg.286]    [Pg.443]    [Pg.240]    [Pg.240]    [Pg.369]    [Pg.394]    [Pg.431]    [Pg.577]    [Pg.263]    [Pg.285]    [Pg.286]    [Pg.443]    [Pg.240]    [Pg.240]    [Pg.369]    [Pg.394]    [Pg.431]    [Pg.577]    [Pg.263]    [Pg.285]   


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A-Ketoketenes

Ketoketenes

Mercaptals

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