Communications - Synthesis of an Isomer of Umbellulone
β Scribed by Smith, Howard E.; Eastman, Richard H.
- Book ID
- 127091058
- Publisher
- American Chemical Society
- Year
- 1956
- Tongue
- English
- Weight
- 113 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0022-3263
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## 9H-quino[4,3,2-de][1,10] phenanthrolin-9one) (1) and an isomer (9H-quino[4,3,2-de][1,7]phenanthrolin-9-one) (4) have been synthesized starting from 1,4-dimethoxyacridone (7). The acridone was converted into 1,4-dimethoxy-9-ethynylacridine ( 11) by a triflate coupling. The ethynylacridine was co
## Tandem conjugate addition by an O-silylcyanohydrin derived carbanion to 5-(1-menthy10xy)-~5~~0~, followed by reaction with an ammatic aldehyde gives two dktereoisomfxic adducts. T&se. afford a single product on treatment with tcrrabutylammonium tluolide. Reduction with concomitant removal of t