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• W2093323942 abstract "The synthesis of some novel 1,4-dimethoxynaphthalene—bridge—heterocycle systems is described. In these systems, the naphthalene and heterocyclic groups are fused to a rigid bridge consisting of linearly fused norbornyl and bicyclo[2.2.0]hexyl groups. Bridges used herein have relays of 2, 4, and 6bonds long. The heterocycle is either 3.6-di(2′-di(2′-pyridyl)-pyridazino, or pyrido and was attached to the bridge by annulation methods. The pyridazino systems, 2(m,n), were synthesized via Diels-Alder reaction of 3,6-di(2′-pyridyl)-1,2,4,5-tetrazine with the alkenes, 13 and 6(m,n), and subsequent aromatization of the adducts with DDQ. Pyridine annulation was successfully carried out using two different methods: (i) Boger pyridine annulation of ketones, 11, 20b, and 21b, (with 1,2,4-triazine and pyrrolidine); (ii) Diels-Alder reaction of alkenes 13 and 6(m,n) with 3-thiomethyl-1,2,4-triazine, followed by Raney nickel reductive desulfurization of the aromatized adducts. The synthesis of Ru(II)(2,2′-bipyridyl)2 complexes of the pyridazino systems. 9(m,n) and 10, is also described." @default.
• W2093323942 created "2016-06-24" @default.
• W2093323942 creator A5044387458 @default.
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• W2093323942 date "1992-09-01" @default.
• W2093323942 modified "2023-10-17" @default.
• W2093323942 title "Synthesis of novel rigid norbornylogous spacers bearing heterocyclic ligands for the investigation of long-range intramolecular electron transfer involving metal centres" @default.
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• W2093323942 doi "https://doi.org/10.1016/s0040-4020(01)90378-3" @default.
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