Eine bequeme Synthese von 2-Aryl-2-vinyl-[1,3]-dioxolanen und -dioxanen
✍ Scribed by Jörn Gutzmann; Paul Messinger
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 218 KB
- Volume
- 328
- Category
- Article
- ISSN
- 0365-6233
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The N‐alkylated 2‐benzoylamino‐benzophenones **2a–e** on treatment with lithium diisopropylamide in tetrahydrofuran at − 78° gave the cyclic alchols **3a–e** which were dehydrated with phosphorous oxychloride/pyridine to give the indoles **4a–e** in 30–72% yield (__Scheme 1__).
## Abstract Die bisher unbekannten 3‐Benzoylmethylen‐2,3‐dihydrofurane **2** wurden durch Isomerisierung von ditertiären Diacetylendiolen **1** in Gegenwart von Quecksilbersalzen erhalten. Als Nebenprodukte können gelegentlich Verbindungen vom Typ der Cyaninfarbstoffe **5** gebildet werden.
## Abstract Some 1‐substituted 2, 3‐dimethyl‐quinoxalinium‐perchlorates were synthesized by reaction of butane‐2, 3‐dion with N‐monosubstituted 1,2‐diamino‐benzenes in strongly acidic solution. 2, 3‐dimethyl‐4‐cyclohexyl‐pyrido[2,3‐__b__]pyraziniumperchlorate was obtained from an analogous reaction