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7
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0342952223
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Minimized using Quanta 97. MSI, 9685 Scranton Road, San Diego, CA 92121-3752
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Minimized using Quanta 97. MSI, 9685 Scranton Road, San Diego, CA 92121-3752, 1996.
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(1996)
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8
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0343387659
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The synthesis of larger macrocycles was also investigated. Repetition of the elongation and functionalisation steps on compound 10b afforded the precursors for the tetra-, penta- and hexatriazine-piperazine macrocycles, which were cyclised into their corresponding scaffolds. In addition, ethylenediamine and xylene were used as spacers. These results will be reported elsewhere. See also Ref. 10.
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The synthesis of larger macrocycles was also investigated. Repetition of the elongation and functionalisation steps on compound 10b afforded the precursors for the tetra-, penta- and hexatriazine-piperazine macrocycles, which were cyclised into their corresponding scaffolds. In addition, ethylenediamine and xylene were used as spacers. These results will be reported elsewhere. See also Ref. 10.
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0342518040
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Compound 8a was also subjected to subsequent hydrogenolysis and a reaction with cyanuric chloride to afford the corresponding dichloride. However, we were not able to cyclise this precursor to the cyclic bistriazine.
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Compound 8a was also subjected to subsequent hydrogenolysis and a reaction with cyanuric chloride to afford the corresponding dichloride. However, we were not able to cyclise this precursor to the cyclic bistriazine.
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15
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0342518039
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High and low temperature NMR experiments showed that possibly the macrocyclic ring is able to invert at room temperature. However, if this does not occur, the unsymmetrically substituted trimers will be produced as a racemic mixture.
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High and low temperature NMR experiments showed that possibly the macrocyclic ring is able to invert at room temperature. However, if this does not occur, the unsymmetrically substituted trimers will be produced as a racemic mixture.
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16
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0033591916
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(a) For oligomers and cyclic molecules based on triazine, see, for example:
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(a) Lipowski, P.; Bieljewska, A.; Kooijman, H.; Spek, A.L.; Timmeman, P.; Reinhoudt, D.N. Chem. commun. 1999, 1311-1312.
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0342518037
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(e) Petrov, A. S.; Belogorodskii, V. V.; Kraiz, B. O.; Myuller, N. R.; Remizov, A. L. J. Gen. Chem. USSR (Engl. Transl.) 1974, 44, 1109-1113.
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