Stereochemistry of addition of mercury salts to alkynesстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Reactions of Hg(OOCR)(2) (R = Et, Pr-n, Pr-i, and Bu-n) with methylphenylacetylene (with the corresponding acids as solvents) give mixtures of cis- and trans-adducts. The quantity of the cis-adduct increases with increase in the length of the acyl substituent. syn-Addition also occurs in the acetoxymercuration of m-chlorophenyl(methyl)acetylene and 1-methoxybut-2-yne; in the latter case, this route predominates. The stereochemistry of the reaction can also depend on the ratio of the reactants. It is proposed that the reaction occurs by several schemes in which these factors manifest themselves in different degrees.