Abstract
Anion exchange resin was successfully used as a catalyst in the Michael condensation (1:4-addition) of acrolein with ethyl acetamidomalonate or ethyl nitromalonate from which γ-acetamido-γ, γ-dicarbethoxybutyraldehyde or γ-nitro-γ, γ-dicarbethoxybutyraldehyde was obtained in a good yield. Several kinds of thiols were similarly allowed to undergo addition with acrolein by the use of anion exchange resins to yield β-thiopropaldehyde derivatives. These experiments have shown that the use of anion exchange resins as a catalyst in such reactions is advantageous and has opened a new field of use for ion exchangers.
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