The total syntheses of dl-aspidospermine'(1) were reported by G. Stork et al. in 1963 (1). and by Y. Ban et al. in 1964(2.3). The key intermediates of the same plane formulas (II and III) in both syntheses were prepared in the independent ways, whose physico-chemical properties
Strained polycyclic aromatic molecules - I synthesis of 9-bromodinaphth[1,2-a:2′,1′-j]anthracene
✍ Scribed by C.F. Wilcox Jr.; P.M. Lahti; J.R. Rocca; M.B. Halpern; J. Meinwald
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- French
- Weight
- 206 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0040-4039
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Enolization and subsequent methylation of 1,2-di(9-anthryllethanone leads to photolabile E/Z-isomeric a,&substituted dianthrylethylenes. 1,2-Di(9-anthryljpropanone forms a crystalline enol which isomerizes photochemically in solution by a unique H shift. Isolable simple enols typically are stabilize
is%= : The title compound which incorporates a strained bridgehead double and highly deformed cis and trans stilbene structures in bicyclo[4.2.2]decane ring system was synthesized in good yield as an air-sensitive substance. Some reactions pertinent to strain were examined.
## Abstract We have synthesised some planar polycyclic compounds, in which unsubstituted aromatic rings are condensed with perfluorinated aromatic rings, and have carried out a combined X‐ray diffraction and computational study to analyse their self‐recognition behaviour in crystalline phases. We c