Abstract
Reactions of enol ethers of cyclopentane-1,3-dione derivatives (I) with cyanide ion were investigated in order to develope new synthetic routes to 3-functionalized-2-cyclopenten-1-one derivatives from I.I could be converted to the 3-cyano-2-cyclopenten-1-one skeleton by several procedures for hydrocyanation, among which Nagata’s reagents (HCN-triethylaluminium, diethylaluminium cyanide) were proved to be potent ones.Reactions of enol ethers of 4-hydroxy-cyclopentane-1,3-dione derivatives were also investigated. From 4-hydroxy-3-methoxy-2-cyclopenten-1-one derivatives (V) 1,4-addition type products with the 4-hydroxy-3-cyano-2-cyclopenten-1-one skeleton (VIII) were obtained as sole isolatable products. NMR studies of some hydroxy-cyclopentenone derivatives were also described.
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