Synthesis and ring transformation of novel tetracyclic fused as-triazines |
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Authors: | Zsuzsanna Riedl György Hajós Gert Kollenz Heinz Sterk András Messmer |
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Institution: | (1) Central Research Institute for Chemistry, Hungarian Academy of Sciences, H-1525 Budapest, Hungary;(2) Institute of Organic Chemistry, Karl-Franzens University Graz, A-8010 Graz, Austria |
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Abstract: | Summary Eight new tetracyclic fused as-triazines (4–6,8,11–13, and15) have been synthesized by conversion and subsequent ring transformation of 1,2-diaminoisoquinolinium (2) and -quinolinium salts (9) with 4-benzoyl-5-phenylfuran-2,3-dione (1). Selective alkylations of the new products revealed that these reactions are governed mainly by the electronic density of the lone pairs as well as by steric effects.Dedicated to em. Univ. Prof. Dr. E. Ziegler on the occasion of his 80th birthday |
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Keywords: | Ring transformation as-Triazines fused Alkylation Regioselectivity Calculation AM1 Annelation effect |
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