𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis of Pyrazoles by Treatment of 3-Benzylchromones, 3-Benzylflavones and Their 4-Thio Analogues with Hydrazine

✍ Scribed by Albert Lévai; Artur M. S. Silva; José A. S. Cavaleiro; Ibon Alkorta; José Elguero; József Jekő

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
151 KB
Volume
2006
Category
Article
ISSN
1434-193X

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Synthesis of Pyrazolyl-2-pyrazolines by
Synthesis of Pyrazolyl-2-pyrazolines by Treatment of 3-(3-Aryl-3-oxopropenyl)chromen-4-ones with Hydrazine and Their Oxidation to Bis(pyrazoles)
✍ Albert Lévai; Artur M. S. Silva; Diana C. G. A. Pinto; José A. S. Cavaleiro; Ibo 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 158 KB

## Abstract The synthesis of several 1‐acetyl‐3‐aryl‐5‐[3‐(2‐hydroxyphenyl)pyrazol‐4‐yl]‐2‐pyrazolines **3a**−**3h** has been accomplished by treatment of the 3‐(3‐aryl‐3‐oxopropenyl)chromen‐4‐ones **1a**−**h** with hydrazine hydrate in hot acetic acid. The 1‐acetyl‐3‐aryl‐5‐(3‐chromonyl)‐2‐pyrazol

Synthesis of 3-aryl-5-styryl-2-pyrazolin
Synthesis of 3-aryl-5-styryl-2-pyrazolines by the reaction of (E,E)-cinnamylideneacetophenones with hydrazines and their oxidation into pyrazoles
✍ Albert LÉvai; TamÁs Patonay; Artur M. S. Silva; Diana C. G. A. Pinto; José A. S. 📂 Article 📅 2002 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 72 KB

## Abstract New 3‐aryl‐5‐styryl‐2‐pyrazolines have been synthesized by the reaction of (__E,E__)‐cinnamylideneace‐tophenones with hydrazines. These 2‐pyrazolines have also been converted into the corresponding pyrazoles by oxidation with chloranil. Structures of all new compounds have been elucidat