Fig. 1: Structural formulae and NMR yields of a series of cage products including 22R2S2, 32R2S2, 42R2S2, 03S6, 13S6, 33S6, 22(EDA)4, 32(EDA)4, 42(EDA)4.
From: The sharp structural switch of covalent cages mediated by subtle variation of directing groups
These cages are produced by condensing each of the corresponding tetraformyl precursors including 0-4, and the bisamino partner namely racemic trans-CHDA, (S,S)-CHDA, or EDA. aThe yields are all determined by using internal standard in the corresponding 1H NMR samples without isolating the corresponding products. bN. D. means Not Determined, because either the target molecules were not produced with observable yields, or the products are generated within a library of mixture whose 1H NMR spectrum is too complicated to determine the corresponding yields.
