✦ LIBER ✦

Synthesis of some pyrano[2,3-c]pyrazoles

✍ Scribed by James W. Pavlik; Vuthichai Ervithayasuporn; Supawan Tantayanon

Publisher: Journal of Heterocyclic Chemistry
Year: 2011
Tongue: English
Weight: 105 KB
Volume: 48
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.562

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Synthetic methods have been developed to prepare pyrano[2,3‐c]pyrazoles with various substituents at ring positions 1, 3, and 6. The ^1^H‐ and ^13^C‐NMR properties of these products and their precursors are presented and discussed. J. Heterocyclic Chem., (2011).

📜 SIMILAR VOLUMES

ChemInform Abstract: Synthesis of Some P

ChemInform Abstract: Synthesis of Some Pyrano[2,3-c]pyrazoles.

✍ James W. Pavlik; Vuthichai Ervithayasuporn; Supawan Tantayanon 📂 Article 📅 2011 🏛 John Wiley and Sons ⚖ 37 KB 👁 1 views

## Abstract Methods for the synthesis of the title compounds with substituents at ring position 1, 3, and 6 are presented.

Synthesis and chemistry of N-arylated py

Synthesis and chemistry of N-arylated pyrano[2,3-c]pyrazoles

✍ J. Geno Samaritoni; Scott Thornburgh; Paul R. Graupner; David H. Cooper 📂 Article 📅 2007 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 340 KB

## Abstract magnified image Novel __N__2‐arylated pyrano[2,3‐__c__]pyrazol‐6‐ones **2** can be prepared in a selective manner by generating the anion of **1** (**RH**) with lithium hexamethyldisilazide in DMF and quenching with activated aryl halides. Sterically demanding groups such as phenyl as

Nitriles in Heterocyclic Synthesis: Synt

Nitriles in Heterocyclic Synthesis: Synthesis of New Pyrazolo [1,5-a]pyrimidines, Pyrano[2,3-c]pyrazoles and Pyrano[3,4-c] pyrazoles

✍ Galal Eldin Hamza Elgemeie; Bahia Y. Riad; Galal A. Nawwar; Sherif Elgamal 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 285 KB 👁 2 views

Ring transformation of spirocyclopropane

Ring transformation of spirocyclopropanepyrazoles into pyrano[2,3-c]pyrazoles

✍ Hiroshi Maruoka; Eiichi Masumoto; Takafumi Eishima; Fumi Okabe; Sho Nishida; Yuk 📂 Article 📅 2009 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 109 KB

## Abstract magnified image An approach to pyrano[2,3‐__c__]pyrazoles starting from spirocyclopropanepyrazoles __via__ a ring‐opening/cyanomethylation and intramolecular cyclization is described. Reactions of spirocyclopropanepyrazoles **1a**, **1b**, **1c**, **1d** with chloroacetonitrile in the

ChemInform Abstract: Synthesis and Chemi

ChemInform Abstract: Synthesis and Chemistry of N-Arylated Pyrano[2,3-c]pyrazoles.

✍ J. Geno Samaritoni; Scott Thornburgh; Paul R. Graupner; David H. Cooper 📂 Article 📅 2008 🏛 John Wiley and Sons ⚖ 35 KB 👁 1 views

ChemInform Abstract: Synthesis of Pyrazo

ChemInform Abstract: Synthesis of Pyrazoles and Fused Pyrazoles. Novel Synthesis of Pyrano[2,3-c]pyrazole, Thieno[2,3-c]pyrazole and Pyrazolo[3,4-b]pyridine Derivatives.

✍ M. K. A. IBRAHIM; A. H. H. ELGHANDOUR; G. S. M. ABDEL-SAYED; A. S. M. ABDEL FATT 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views