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- W2045503995 abstract "Reaction of azaline B acetate (1) with freshly prepared trifluoroacetyl hypoiodite in trifluoroacetic acid - methylene chloride solution under anhydrous conditions produced a complex mixture of products from which compounds 2 and 3, resulting from iodination at the 1′-and 8′-positions of the Ac-D Nal1 residue, were isolated by preparative reversed-phase HPLC chromatography. Mass spectral analysis and 1H, 2D DQF-COSY and homonuclear 2D J-resolved NMR experiments confirmed these structures. Reductive tritiation of 2 over 10% Pd/C in EtOH - DMF (1:9, v/v) with 50 Ci T2 followed by chromatographic purification and salt exchange gave 37.5 mCi of tritiated azaline B acetate (4) having >98% chemical and radiochemical purities and a specific radioactivity of 11.2 Ci / mmol. A single peak at 7.59 ppm was observed in the proton decoupled tritium NMR spectrum. © 1997 John Wiley & Sons, Ltd." @default.
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- W2045503995 date "1997-02-01" @default.
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- W2045503995 title "Synthesis of tritium-labeled azaline B acetate" @default.
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- W2045503995 doi "https://doi.org/10.1002/(sici)1099-1344(199702)39:2<147::aid-jlcr953>3.0.co;2-3" @default.
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