The (+)-cis-chromanochromanones (2) and (3), representing the basic ringsystem of the natural insecticide rotenone, have been synthesised by a general procedure; the key step is 4-aroylation of the 4-phenyl-sulphonyl)chromans (7; Z=S02Ph). Rotenone (1) is the principle insecticide of Derris resin, a
A new simple approach to the [6] (2,5)pyridinophane ring system
โ Scribed by Makoto Nnitta; Tomoshige Kobayashi
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- French
- Weight
- 139 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Upon treatment with [Mo(CO) ,I, 3-phenyl-4,5-hexamethyleneisoxazole undergoes an inclusion of acetylenic ester across the C4-C5 bond and elimination of an oxygen atom leading to 6pyridinophane derivative.
๐ SIMILAR VOLUMES
## Abstract For Abstract see ChemInform Abstract in Full Text.
A synthesis of a functionalized bicyclo[6.2.1]undecane, N- (7-hydroxymethyl-bicyclo[6.2.1]undeca-3,5,9-trien-2-yl)-4methyl-benzenesulfonamide, is described. Starting with a [6+4] cycloaddition between cyclopentadiene and cycloheptatrienone, the final product was prepared in five steps with an overal
A simple route to the bicycle ( 5.2.1 > decane system by oxidation of trimethylenenorbornane is demonstrated.
A simple two step sequence for ihe construction of highly functionalised bicyclo[ 5.2.l]decane and its transformation to bicyclo[ 5.3.1]undecane is described for entry into bridged ring terpenoids.