THE first aromatic rzingsystemswith quaternarynitrogenatoms attwobridgehead positions were recently prepared by Bradsher and Perhem (1). These authors describe several isomeric diazoniapentaphene salts, e.g., (I), in which the two quatercarynitm~ atoms arelocated in different rings. Among factors of
โฆ LIBER โฆ
Aromatic nitrogen bridgehead compounds. III. The synthesis of 8a,10a-diazoniaphenanthrene and related cations
โ Scribed by Calder, IC; Sasse, WHF
- Book ID
- 123621737
- Publisher
- Commonwealth Scientific and Industrial Research Organisation Publishing
- Year
- 1968
- Tongue
- English
- Weight
- 919 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0004-9425
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## Abstract Cyclization reactions of __N__โ(2,2โdialkoxyethyl)โ1,4โbenzothiazine lactams 2 and 1,4โbenzothiazineโsulfones 10 lead to the corresponding pyrrolo[1,2,3โ__de__]โ1,4โbenzothiazines 4 and 12, respectively, by using the dioxane/__p__โtoluenesulfonic acid or polyphosphoric acid/chloroform s