Synthesis of pyrazolo[1,5-a]pyrimidines in the reaction of 5-amino-3-arylpyrazoles with methoxymethylene meldrum's acid derivatives and thermolysis of their pyrazolylaminomethylene derivatives

ChemInform Abstract: Synthesis of Pyrazo

ChemInform Abstract: Synthesis of Pyrazolo[1,5-a]pyrimidines in the Reaction of 5-Amino-3-arylpyrazoles with Methoxymethylene Meldrum′s Acid Derivatives and Thermolysis of Their Pyrazolylaminomethylene Derivatives.

✍ J. QUIROGA; A. HORMAZA; B. INSUASTY; C. SAITZ; C. JULLIAN; A. CANETE 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

Synthesis of N-Alkylated Derivatives of

Synthesis of N-Alkylated Derivatives of Pyrazolo[1,5-a]pyrimidine and Their Reaction with Methylamine.

✍ G. G. Danagulyan; G. A. Panosyan; A. P. Boyakhchyan 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 113 KB 👁 1 views

Reaction of 5-amino-1-aryl-3-methylpyraz

Reaction of 5-amino-1-aryl-3-methylpyrazoles with benzylidene derivatives of meldrum's acid: Synthesis and characterization of pyrazolo[3,4-b]pyridinones

✍ Jairo Quiroga; Angelina Hormaza; Braulio Insuasty; Manuel Márquez 📂 Article 📅 1998 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 201 KB

## Abstract A series of dihydropyrazolo[3,4‐__b__]pyridin‐6‐ones 3 was prepared by cyclization of 5‐amino‐1‐aryl‐3‐methylpyrazoles 1 and Meldrum's acid benzylidene derivatives 2 in nitrobenzene. The structure of 4,5‐dihydropyrazolo[3,4‐__b__]pyridin‐6‐ones and reaction orientation were determined b

ChemInform Abstract: Reaction of 5-Amino

ChemInform Abstract: Reaction of 5-Amino-1-aryl-3-methylpyrazoles with Benzylidene Derivatives of Meldrum′s Acid: Synthesis and Characterization of Pyrazolo[3,4-b]pyridinones (III).

✍ J. QUIROGA; A. HORMAZA; B. INSUASTY; M. MARQUEZ 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 30 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

ChemInform Abstract: Three-Component Con

ChemInform Abstract: Three-Component Condensation of 5-Aminopyrazole Derivatives with Isatins and Meldrum′s Acid. Synthesis of 1,7-Dihydrospiro[pyrazolo [3,4-b]pyridine-4,3′-indole]-2′,6(1′H,5H)-diones.

✍ B. V. Lichitsky; A. N. Komogortsev; A. A. Dudinov; M. M. Krayushkin 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 21 KB 👁 1 views

Synthesis of 5-cyanopyrazolo[3,4-b]pyrid

Synthesis of 5-cyanopyrazolo[3,4-b]pyridines in the reaction of 5-amino-3-methyl-1-phenylpyrazole with arylidene derivatives of malonodinitrile and ethyl cyanoacetate

✍ Jairo Quiroga; Mario Alvarado; Braulio Insuasty; Rodolfo Moreno; Enrique Raviña; 📂 Article 📅 1999 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 328 KB

## Abstract This paper describes the synthesis of a new series of 6‐amino‐4‐aryl‐5‐cyanopyrazolo[3,4‐__b__]pyridines 4 and 4‐aryl‐5‐cyano‐6__H__‐pyrazolo[3,4‐__b__]pyridin‐6‐ones 5 from the reaction of 5‐amino‐3‐methyl‐1‐phenylpyrazole 1 with arylidene derivatives of malonodinitrile 2 and ethyl cya