Exclusive Formation of 1‐Aryl‐3‐(5‐nitro‐2‐furyl)‐4‐aroylpyrazoles via Regiospecific 1,3‐Dipolar Cycloaddition of 3‐Arylsydnones with &agr;,β‐Acetylenic Ketones

Author： Hegde Jyoti   Rai Ganesha   Puranik Vedavati   Kalluraya Balakrishna  

Publisher： Taylor & Francis Ltd

ISSN： 0039-7911

Source： Synthetic Communications, Vol.36, Iss.9, 2006-05, pp. : 1285-1290

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Abstract

1,3‐Dipolar cycloaddition of 3‐arylsydnones with &agr;,β‐acetylenic ketones containing nitrofuran moiety has been studied, and it was observed that the dipolar cycloaddition is regiospecific, forming 1‐aryl‐3‐(5‐nitro‐2‐furyl)‐4‐aroylpyrazoles exclusively.

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