𝔖 Bobbio Scriptorium
✦   LIBER   ✦

New and practical synthesis of 1,4-dihydrobenzopyrano-pyrazoles

✍ Scribed by S Chandrasekhar; G Rajaiah; P Srihari


Book ID
104231384
Publisher
Elsevier Science
Year
2001
Tongue
French
Weight
69 KB
Volume
42
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis


A new method for the synthesis of 1,4-dihydrobenzopyranopyrazoles using bromovinyl hydrazones has been described involving a [3+2] intramolecular cycloaddition.


📜 SIMILAR VOLUMES


New succinyl-spaced pyrazoles: Regiosele
✍ Helio G. Bonacorso; Cleber A. Cechinel; Gisele R. Paim; Marcos A. P. Martins; Ni 📂 Article 📅 2010 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 99 KB

The facile and convenient access by a conventional procedure in ethanol as solvent to a new series of succinyl-spaced pyrazoles including 1,4-bis[5-(trichloromethyl)-5-hydroxy-4,5-dihydro-1H-pyrazol-1yl]butane-1,4-diones (64-82%) and the respective dehydrated derivatives as 1,4-bis[5-(trichloromethy

Synthesis of new 1-[4-methane(amino)sulf
✍ Khaled R. A. Abdellatif; Morshed A. Chowdhury; Edward E. Knaus 📂 Article 📅 2008 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 190 KB

## Abstract magnified image A regiospecific cyclization‐dehydration reaction of a 1‐[(4‐(__N__‐alkyl‐__N__‐(__tert__‐butyloxycarbony)amino)‐phenyl]‐4,4,4‐trifluorobutane‐1,3‐done with a 4‐aminosulfonyl‐, or 4‐methylsulfonyl‐, phenylhydrazine hydrochloride in refluxing ethanol proceeded with simult