Reaction of the grignard reagent from 3-chloro-2,4-dimethyl-1-pentene with 2,4-dimethyl-3-penta none, ethyl formate, and amyl butyrate
β Scribed by V. A. Ponomarenko; T. Ya. Tolkacheva
- Book ID
- 112490447
- Publisher
- Springer
- Year
- 1955
- Tongue
- English
- Weight
- 544 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1573-9171
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Th8 competitive addition-reduction of 2,kdlmethyl-3-pento rith %.PrHgRra vas studied using the procedure described earlier'. The reaction vas followed by quantitative vapour pba8e chromatogra phY2 analysis of the products. The Grlgnard reagent was prepared by reaction of n.propylbromlde vlth magne-
The title reactions furnished the pyran ring cleaved product (3) and the tetracyclic chromene (5), rather than the expected 4-cyclicamido-3hydroxy benzopyrans (l,R=CN and NO2, respectively, n=ll). Mechanisms proposed for these reactions require a strong electron withdrawing group at C(6) in the benz