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Einfacher Zugang zu 5-Nor-, 15-Nor- und 5,15-Bisnorcobester

✍ Scribed by Cornelius Nussbaumer; Prof. Dr. Duilio Arigoni


Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
210 KB
Volume
95
Category
Article
ISSN
0044-8249

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📜 SIMILAR VOLUMES


A Simple Route to 5-Nor, 15-Nor-, and 5,
✍ Cornelius Nussbaumer; Prof. Dr. Duilio Arigoni 📂 Article 📅 1983 🏛 John Wiley and Sons 🌐 English ⚖ 218 KB

shifted UV/VIS spectrum of the chromophore of 5,15-bisnorcobester 2131 was observed. The reaction is only reproducible in the presence of small amounts of CCl,. Under optimized conditions (Scheme 1) the didemethylation proceeds almost quantitatively (UV/VIS spectroscopy). The crystalline product (56

Ein einfacher Zugang zu 4-hydroxy-2,5-di
✍ Luciano Re; Bruno Maurer; Günther Ohloff 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 903 KB

## Abstract Furaneol®Registered trade mark of __Firmenich SA__. [4‐hydroxy‐2,5‐dimethyl‐3(2__H__)‐furanone (**1**)], a flavour component of pineapple and strawberry, has been prepared by a two‐step synthesis starting with readily available 3‐hexyne‐2,5‐diol. By the same method 4‐hydroxy‐5‐methyl‐

Katalytische Carbonylierung von Aceton-o
✍ Meinhard Langenbahn; Helen Stoeckli-Evans; Georg Süss-Fink 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 German ⚖ 312 KB

In the presence of catalytic amounts of [Ru,(CO),(Me2CNO)2(Me2CNOH)2] (l), acetone oxime reacts with carbon monoxide to give 2,3,4,5-tetrahydro-2,2,4,4,6-pentamethylpyrimidine ('acetonine'), CO,, and NH,. The reaction proceeds presumably via carbonylation of Me,C=NOH to the unstable intermediate Me,

Umwandlung von 4-Acyl-Δ2- und 2-Acyl-Δ3-
✍ Höfle, Gerhard ;Steglich, Wolfgang 📂 Article 📅 1971 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 661 KB

## Abstract 4‐Acyl‐Δ^2^‐ und 2‐Acyl‐Δ^3^‐oxazolone‐(5) **1** bzw. **5** liefern beim Erhitzen unter Cycloeliminierung von CO~2~ trisubstituierte Oxazole **2** bzw. **6**. Im letzteren Fall tritt dabei eine formale Vertauschung der Substituenten an den Atomen 2 und 4 des Oxazolringes ein, die zu ein