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Chemo- and Regioselective 1,3-Dipolar Cycloaddition of 2-Diazopropane over 1,4-Benzoquinone: Synthesis of New Pyrazoloquinones

✍ Scribed by Hamadi, Naoufel Ben; Lachheb, Jalel; Guerfel, Taha; Msaddek, Moncef

Book ID: 118163158
Publisher: Taylor and Francis Group
Year: 2013
Tongue: English
Weight: 302 KB
Volume: 43
Category: Article
ISSN: 0039-7911
DOI: 10.1080/00397911.2011.610552

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## Abstract The reaction of N‐aryl‐C‐ethoxycarbonyl nitrilimines with [1,2,4]triazepin‐3,5‐dithione leads to title compounds. The 1,3‐dipolar cycloaddition is completely peri and regioselective. The preferred orientation of addition is predicted correctly by AM~1~ calculation.