Dimethyl mesaconate

Substrates for hydrogenation were methyl cinnamate (I), methyl-a-methyl cinnamate (II), methyl-p-methyl cinnamate (III), methyl-a-phenyl cinnamate (IV), dimethyl itaconate (V), dimethyl mesaconate (VI), and dimethyl citraconate (VII). Their structures and the names of the corresponding hydrogenation products are given in Table 1. 

Cycloaddition of the nitrone 10a with dimethyl citraconate47 and mesaconate,47 methyl / ,/ -dimethyl acrylate,36 and mesityl oxide36 (for all of them Y = H) gives cycloadducts X. Some of the results are summarized in Table I. 

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