Jmg. Fernandez et al., SYNTHESIS, CONFORMATIONAL FLEXIBILITY AND PRELIMINARY COMPLEXATION BEHAVIOR OF ALPHA,ALPHA'-TREHALOSE-BASED MACROCYCLES CONTAINING THIOUREASPACERS, Journal of the Chemical Society, Chemical Communications, (1), 1995, pp. 57-58
An efficient synthesis of macrocyclic ligands incorporating two alpha,
alpha'-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(=S) bonds is governed by intramolecular hydrogen bonding as w
ell as steric factors.