✦ LIBER ✦

Synthesis of some pyrazolo[1,5-c][1,3]benzoxazines and a new 5H-pyrazolo[1,5-c][1,3,2]benzoxazaphosphorine ring system

✍ Scribed by Jan Svetlik; Nada Pronayova; Jiri Kubista

Publisher: Journal of Heterocyclic Chemistry
Year: 2005
Tongue: English
Weight: 93 KB
Volume: 42
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570420616

No coin nor oath required. For personal study only.

✦ Synopsis

Condensations of 5-(2-hydroxyphenyl)pyrazoline 3a with 4-carboxybenzaldehyde, glyoxylic acid and N,N'-carbonyldiimidazole leading to pyrazolobenzoxazine derivatives were studied. The observed diastereoselectivity is discussed. Reaction of 3a with Lawesson reagent gave rise to a new 5H-pyrazolo[1,5-c]-[1,3,2]benzoxazaphosphorine heterocyclic system.

📜 SIMILAR VOLUMES

Synthesis of Some Pyrazolo[1,5-c][1,3]be

Synthesis of Some Pyrazolo[1,5-c][1,3]benzoxazines and a New 5H-Pyrazolo[1,5-c][1,3,2]benzoxazaphosphorine Ring System

✍ Jan Svetlik; Nada Pronayova; Jiri Kubista 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 20 KB 👁 1 views

ChemInform Abstract: One-Pot Synthesis o

ChemInform Abstract: One-Pot Synthesis of 9H-Indolo[3,2-c]pyrazolo[1,5-a]quinolines, 1H-Dipyrazolo[1,5-a:4′,3′-c]quinolines and 1H-Imidazo[4,5-c]pyrazolo[1,5-a]quinolines: Three New Heterocyclic Systems.

✍ Yiming Zhang; Ren Wang; Zongjun Shi; Wei Zhang 📂 Article 📅 2011 🏛 John Wiley and Sons ⚖ 28 KB 👁 1 views

ChemInform Abstract: Synthesis of New Py

ChemInform Abstract: Synthesis of New Pyrazolo[1,5-a]-s-triazine, Pyrazolo[5,1-c]-as-triazines, Pyrazolo[1′,5′:1,2]imidazo[4,5-b]quinoxaline, and Pyrazolo[1,5-a]pyrimidines.

✍ M. A. ZAHRAN; A. A. HASSANIEN; H. A. EMAM; M. Z. EL-SAID; Y. A. AMMAR 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 32 KB 👁 1 views

ChemInform Abstract: Aryl-Substituted 1,

ChemInform Abstract: Aryl-Substituted 1,10b-Dihydro-5H-pyrazolo[1,5-c]1,3-benzoxazines.

✍ S. M. Desenko; N. V. Getmanskii; V. N. Chernenko; I. M. Zemlin; O. V. Shishkin; 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 28 KB 👁 1 views

Synthesis of Pyrazolo[5,1–c][1,2,4]triaz

Synthesis of Pyrazolo[5,1–c][1,2,4]triazines, Isoxazolo[3,4-e]pyrazolo-[5,1–c][1,2,4]triazines and Aminopyridones

✍ Kamal U. Sadek; Nadia S. Ibrahim; Mohamed H. Elnagdi 📂 Article 📅 1988 🏛 John Wiley and Sons 🌐 English ⚖ 236 KB 👁 1 views

Synthesis of Trifluoromethyl-Promoted Fu

Synthesis of Trifluoromethyl-Promoted Functional Pyrazolo[1,5-a]pyrimidine and Pyrazolo[5,1-d][1,2,3,5]tetrazine-4(3H)-ones.

✍ Yan-Chao Wu; Yong-Jun Chen; Hui-Jing Li; Xiao-Mao Zou; Fang-Zhong Hu; Hua-Zheng 📂 Article 📅 2006 🏛 John Wiley and Sons ⚖ 26 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.