<b>Reactions of 5-[1-(2-phenyl)methylidene]-3-phenylimidazolidine-2,4-diones with some organometallic reagents</b>
oleh: Teresa A. R. Akeng'a, Roger W. Read
| Format: | Article |
|---|---|
| Diterbitkan: | Chemical Society of Ethiopia 2005-06-01 |
Deskripsi
The reaction of Grignard reagents with 5-[1-(2-chlorophenyl)methylidene]-3-phenylimidazolidine-2,4-dione, <b>4</b>, and 5-[1-(2-bromophenyl)methylidene]-3-phenylimidazolidine-2,4-dione, <b>5</b>, gave exclusively 1,2-addition products, <b>6-8</b>, in 70-80% yields. Lithium dibutylcuprate reacted with <b>4</b> to yield exclusively 1,2-addition product <b>9</b> (92%). No conjugate or 1,4-addition products were obtained. These results indicate that 5-[1-(2-phenyl)methylidene]-3-phenylimidazolidine-2,4-diones do not react like normal unsaturated carbonyl compounds.