Synthesis of 3-R2-4-R1-acetyl-(ethoxycarbonyl)-6-hydroxy-6-methylindazoles.

Authors :: Sorokin, V.
Grigor'ev, A.
Ramazanov, A.
Krivenko, A.
Source :: Chemistry of Heterocyclic Compounds; Jun1999, Vol. 35 Issue 6, p671-673, 3p
Publication Year :: 1999
Abstract: It was discovered that functionally substituted tetrahydroindazoles can be aromatized by the action of sulfur. Previously unknown 3-R<superscript>2</superscript>-4-R<superscript>1</superscript>-5-acetyl(ethoxycarbonyl)-6-methylindazoles were obtained. The products from aromatization cannot be obtained if a nitro group is introduced or one heteroatom in the substrate is replaced by oxygen. [ABSTRACT FROM AUTHOR]