𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Notizen 1,3-Dipolar Cycloadditions of Benzonitrile Oxides to 1-Aroyl-4,5-dihydro-3,4,4-trimethyl-5-methylene-1H-pyrazoles

✍ Scribed by Papadopoulos, Stelios ;Stephanidou-Stephanatou, Julia

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
363 KB
Volume
1985
Category
Article
ISSN
0947-3440

No coin nor oath required. For personal study only.

✦ Synopsis

1,3‐Dipolare Cycloadditionen von Benzonitriloxiden an 1‐Aroyl‐4,5‐dihydro‐3,4,4‐trimethyl‐5‐methylen‐1__H__‐pyrazole

Die 1‐Aroyl‐4,5‐dihydro‐3,4,4‐trimethyl‐5‐methylen‐1__H__‐pyrazole 2, dargestellt durch Wasserabspaltung aus den entsprechenden 4,5‐Dihydro‐5‐hydroxy‐1__H__‐pyrazolen 1, reagieren mit aromatischen Nitriloxiden unter 1,3‐dipolarer Cycloaddition zu den neuen Spiroverbindungen 6. Unter drastischeren Reaktionsbedingungen wurde auch das tricylische 1,2,4‐Oxadiazol 7 erhalten. Das chemische Verhalten der neuen Spiro‐Addukte 6 wird beschrieben.

📜 SIMILAR VOLUMES

1,3-Dipolar Cycloaddition of Benzonitril
1,3-Dipolar Cycloaddition of Benzonitrile Oxide to Substituted 4,5-Dihydro-3-methylene-2(3H)-furanones
✍ Štverková, Slávka ;Žák, Zdirad ;Jonas, Jaroslav 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 462 KB

## Abstract Benzonitrile oxide cycloadds to the CC bond of substituted 4,5‐dihydro‐3‐methylene‐2(3__H__)‐furanones 1a–1g. Thus, (__E__)‐1a and (__E__)‐1b are converted into the corresponding isoxazolinespirodihydrofuranones (4__RS__,5__RS__)‐2a and (4__RS__,5__RS__)‐2b, and (__E__)‐1c is converted

1,3-Dipolar cycloaddition reaction of 4,
1,3-Dipolar cycloaddition reaction of 4,5-dihydro-1H-imidazole 3-oxides with alkynes
✍ Sergey A. Popov; Nikita V. Chukanov; Galina V. Romanenko; Tatjana V. Rybalova; Y 📂 Article 📅 2006 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 346 KB

Dihydro-1H-imidazole 3-oxides bearing different substituents at positions 1 and 2 of the heterocycle were shown to react with a wide range of acceptor-substituted alkynes forming corrsponding cycloadductsderivatives of 1,2,3,7a-tetrahydroimidazo[1,2-b]isoxazole. High regioselectivity of this process