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- W2111037963 abstract "Abstract Chiral and achiral macrocyclic diketal diamines, analogs of cyclams, were synthesized from the previously obtained corresponding diketal dilactams by reduction with lithium aluminum hydride in the presence of a trace amount of triethylamine. In the (15–30) × 10 –3 M concentration range, the reaction led mainly to the expected doubly reduced compounds except in the trans ‐OMe substituted series (R = Ph, Me), in which it partially stopped at the single reduction stage. A conformational study conducted by liquid NMR spectroscopy and molecular mechanics calculations showed that the most stable conformations were either set in a rectangular [3434]‐type structure for trans ‐OMe compounds 7b (R = Me) and 10b (R = H) or stabilized by two intramolecular NH ··· O hydrogen bonds for all the other macrocyclic diamines. Tc‐99m radiolabeling with the nitrido–technetium core [TcN] 2+ gave ≈10–20 % exchange yields. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)" @default.
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- W2111037963 date "2008-04-01" @default.
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- W2111037963 title "Macrocyclic 14-Membered Ring Diketal Diamines: Synthesis, Conformational Analysis and99mTc Radiolabeling Evaluation" @default.
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- W2111037963 doi "https://doi.org/10.1002/ejoc.200701151" @default.
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