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ChemInform Abstract: Regiochemistry of the Cycloaddition of Nitrilium N-Phenylimides to Dibenzalacetone: A Reinvestigation.

✍ Scribed by H. A. ALBAR; M. A. ABDALLAH; M. A. N. MOSSELHI; A. S. SHAWALI

Publisher
John Wiley and Sons
Year
2010
Weight
29 KB
Volume
28
Category
Article
ISSN
0931-7597

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Reaction of benzonitrilium N-phenylimide 3a with dibenzalacetone 1 yielded a mixture of the mono-and biscycloadducts 8a and 1 la in a I:I ratio. A similar reaction of' 1 with ethoxycarbonylnitrilium N-phenylimide 3b afforded a mixture of the cycloadducts 7b, 8b, and 12b in a 1:3:6 ratio, respectivel

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Abstrakt -The cycloaddition raktiona of diphanylnitrllimine to coumarin, 3-β€’thoxycarbonyl and 3-acetylcouarins vere studied. The obmrvod regiochmistry of the reaction vith tha couaarin 4a ~a. the mme am the ona suggmted by other rwoarcharo. ror the co&ins Ib and Ic bearing an electron withdrawing gr