The wallach rearrangement of α- and β-2-phenylazoxynaphthalenes. Ortho orientation in the acid catalyzed transformation.
✍ Scribed by E. Buncel; A. Dolenko
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- French
- Weight
- 178 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
✦ Synopsis
The Wallach rearrangement of azoxybenzene in acid medium yields E-hydroxyazobenzene2 while on irradiation with sunlight (or u.v.) o-hydroxyazobenrene is obtained. 3 In the
📜 SIMILAR VOLUMES
## Abstract __tert__‐Butyl α,β‐dioxobutyrate (hydrate; **1d**) undergoes, at medium or high pH, the benzilic‐acid rearrangement with exclusive 1,2‐shift of the COO(__t__‐Bu) group; the same is true for the corresponding isopropyl ester **1c** and ethyl ester **1b** at high pH, whereas at lower pH,
## Abstract Alkyl (Z)‐2‐[(__E__)‐2‐ethoxycarbonyl‐2‐(2‐pyridinyl)ethenyl]amino‐3‐dimethylaminopropenoates **7** and **8** were prepared from ethyl 2‐pyridinylacetate (1) in two steps. Substitution of the dimethylamino group with alkyl‐, aryl‐, or heteroarylamines afforded the corresponding β‐alkyl‐