An efficient synthesis of macrocyclic ligands incorporating two α,α′-trehalose subunits linked through the primary C-6,6′ positions by means of 1,3-thiourea spacers is reported; the Z/E configuration of the N–C(![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
S) bonds is governed by intramolecular hydrogen bonding as well as steric factors.
J. M. G. Fernández, J. L. J. Blanco, C. O. Mellet and J. Fuentes, J. Chem. Soc., Chem. Commun., 1995, 57 DOI: 10.1039/C39950000057
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