Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Derivatives of the ethyl ester of (α-cyanofurylacrylic acid)..SDS of cas: 2689-65-8.
Derivatives of Et α-cyanofurylacrylate (I; R = H, NO2, Br, I) were synthesized and tested for fungicidal activity. In vitro against 9 fungi, I (R = NO2) gave >90% inhibition of 5 species (Penicillium italicum, P. digitatum, Phytophthora nicotianae, Helminthosporium oryzae, and Phomopsis citri). As a 0.3% spray, it gave good control of blue mold of tobacco in pot experiments
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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem