Anionic [4 + 2] cycloaddition reactions of dihydropyrazolin-5-one dienolate with dienophiles: a novel approach for substituted and fused indazolones

Roy, Amrita ; Reddy, Kethiri R. ; Ila, Hiriyakkanavar ; Junjappa, Hiriyakkanavar (1999) Anionic [4 + 2] cycloaddition reactions of dihydropyrazolin-5-one dienolate with dienophiles: a novel approach for substituted and fused indazolones Journal of the Chemical Society, Perkin Transactions 1 (20). pp. 3001-3004. ISSN 0300-922X

Preview

PDF - Publisher Version
214kB

Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/1999...

Related URL: http://dx.doi.org/10.1039/A903710A

Abstract

Dihydropyrazolin-5-one dienolate 2 generated by deprotonation of 2,3-dimethyl-4-formyl-1-phenylpyrazolin-5-one (4-formylantipyrine) is shown to be an efficient anionic pyrazolone α -oxy-o-quinodimethane analog, which undergoes facile cycloaddition with a variety of dienophiles to give substituted indazolones in good yields after dehydration-dehydrogenation of cycloadducts.

Item Type:	Article
Source:	Copyright of this article belongs to Royal Society of Chemistry.
ID Code:	24095
Deposited On:	29 Nov 2010 10:27
Last Modified:	17 May 2016 07:51

Repository Staff Only: item control page