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Beilstein J. Org. Chem. 2011, 7, 329–337, doi:10.3762/bjoc.7.43
Graphical Abstract
Figure 1: Parent TBTQ 1, three bridgehead-alkylated congeners 2–4, and three TBTQ tris-urea derivatives 5–7 b...
Scheme 1: Nitration of tetramethyl-TBTQ 3 to give a 1:3 mixture of the trinitro derivatives 8 and 9, and subs...
Figure 2: Partial 1H NMR spectrum (500 MHz, CDCl3) of the mixture of the trinitro-TBTQ isomers 8 and 9.
Scheme 2: Syntheses of tris-phenylurea-substituted tribenzotriquinacenes 5–7. Reagents and conditions: (i) Ph...