Chiral Cyclobutane-Based Ureas as Versatile Platforms to Tune Structural Diversity: An Experimental and Theoretical Approach
作者:Ona Illa、Eric Da Silva、Elisabeth Torres、Ángel Álvarez-Larena、Klaus Wurst、Rosa M. Ortuño、Vicenç Branchadell
DOI:10.1021/acs.cgd.3c01467
日期:2024.4.3
Four new chiral 2,2′-disubstituted biscyclobutane ureas have been synthesized and crystallized. Each of them bears a different substituent on positions 2,2′, that is, esters, hydroxymethyl groups, and carboxyl groups. The mode of aggregation of each urea in the crystal packing to form chains, helices, sheets, and others is tuned both by the intermolecular hydrogen bonds between the urea groups and