Enhydrazine, XXX [1]. Phenyloge Enhydrazine ohne direkte N.N-Bindung / Enehydrazines, XXX [1]. Phenylogous Enehydrazines without a Direct N,N-Bond

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Abstract
The phenylogous enehydrazines 3 a-c prepared from the three isomeric benzenediamines 1 a - c and dimedone (2) were treated with the acetylenic esters 4a-b. While 3 c did not react under the applied conditions, 3 a, b gave the openchained products 5 a, b, 7 a, b, and 9 and, in one case, the ringclosed N-addition product 6 as well as the C-addition products which, however, cyclized to the corresponding quinoline-2,5-diones 8 a, b and 10. In compound 11 both reaction types were realized.

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