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Methylthiomaleic anhydride

Methylthiomaleic anhydride, 351-352 Methylthiomethyl esters, 94 Methylthiomethyl ethers, 464... [Pg.302]

Readily available methylthiomaleic anhydride reacts smoothly with dienes giving Diels-Alder adducts [e.g. (149) from 2-methyl-buta-1,3-diene] which are transformed to j8-keto-ester ketals, e.g. (150), by oxidative decarboxylation (cf. ref. 49). Intermediate (149) can also be converted into the corresponding a-methylene-ketone or oxidized to salicylic esters. a-Nitroacetoacetates (151) have been prepared by condensing a-nitroacetates with ketene diethyl acetal followed by hydrolysis of the acetoacetate enol ether thus formed. [Pg.102]

Another novel dienophile, 2-methylthiomaleic anhydride (88), has provided a new annelative approach to cyclic jS-keto-esters and a-methylene-ketones (Scheme 19), while vinyltriphenylphosphonium bromide (89) has proved useful as both an allene and a keten equivalent (Scheme 20). ... [Pg.213]

Reactivity. Methylthiomaleic anhydride (1) has been reported to react as a regioselective, endoselective, electron-deficient 2n partner in [ 4s + ir2s] cycloaddition reactions. ... [Pg.385]

See other pages where Methylthiomaleic anhydride is mentioned: [Pg.58]    [Pg.385]    [Pg.385]    [Pg.647]    [Pg.649]    [Pg.664]    [Pg.58]    [Pg.385]    [Pg.385]    [Pg.647]    [Pg.649]    [Pg.664]   
See also in sourсe #XX -- [ Pg.385 ]



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