Chemistry of 1,1,2,2-tetracyanoethane. Communication 13. Stereochemistry and structure of 5-methyl-3-(1-methyl-3-isopropoxyallyl)-1-formyl-3,4,4-tricyano-1-cyclopentene
โ Scribed by A. B. Zolotoi; S. V. Konovalikhin; O. A. D'yachenko; L. O. Atovmyan; S. P. Zil'berg; P. M. Lukin; A. N. Lyshchikov; O. E. Nasakin
- Publisher
- SP MAIK Nauka/Interperiodica
- Year
- 1990
- Tongue
- English
- Weight
- 452 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0022-4766
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The Michael condensation of l,l,2,2-tetracyanoethane with 3-methyl-4-benzylideneisoxazolin-5-one having the Z configuration leads to a heterocyclic spiran with retention of the cis orientation of the phenyl and keto groups. The deviations of the series of bond angles of the spiran from the standard
Shikimic acid (~-1) was first isolated from the oriental plant Illicium religiosum (in Japanese, shikimi) in 1885 by Eijkma&. After nearly 50 years, thanks to the pioneering works of Fischer and Dangschat4 during the 1930's, the complete structure and absolute stereochemistry of this acid were estab