Sydnone and sydnonimine. A novel conversion to pyrazolin-5-one I
β Scribed by Y. Saito; T. Teraji; T. Kamiya
- Book ID
- 104247999
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- French
- Weight
- 168 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
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R 80 Ph f C6H4CH3-(2) c C,jH,CH3-(4) h d C,H40CH3-(2) i 1037 -HCN 7 R C,H40H-(4) C, H, NH, -(4) ' ? J C d N H R t CpH4N02-(4) C6H4CI-(2) I Key Word: 2-Pyrazolin-5-one derivatives e attack of the amine at the cyclic amide carbonyl function should afford 6 by ring opening and recyclization. Alternatel
## Abstract The reaction of some active methylene compounds with 4β(dicyanomethylene)β3βmethylβ1βphenylβ2βpyrazolineβ5βone (1a) has been investigated. This reaction involves a Michael addition to afford 4βspirocyclobutenes 3 or cyclopyranβ2βpyrazolineβ5βones 4, depending on the active methylene der