✦ LIBER ✦

3-Methylthio-pyrano[4,3-c]pyrazol-4(2H)-ones from 3-(bis-methylthio)methylene-2H-pyran-2,4-diones and hydrazines

✍ Scribed by Yu-Xin Li; You-Ming Wang; Xiao-Ping Yang; Su-Hua Wang; Zheng-Ming Li

Publisher: John Wiley and Sons
Year: 2003
Tongue: English
Weight: 72 KB
Volume: 14
Category: Article
ISSN: 1042-7163
DOI: 10.1002/hc.10158

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A useful synthesis of 3‐methylthio‐6‐methyl‐pyrano[4,3‐c]pyrazol‐4(2__H__)‐ones via 3‐(bis‐methylthio)methylene‐5,6‐dihydro‐6‐alkyl(aryl)‐2__H__‐pyran‐2,4‐dione with hydrazine as well as methyl and phenyl hydrazines is described and the mechanism of the formation is discussed. © 2003 Wiley Periodicals, Inc. Heteroatom Chem 14:342–344, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.10158

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