10.1021/ol049030n.s002 Anton V. Yakovenko Anton V. Yakovenko Vyacheslav I. Boyko Vyacheslav I. Boyko Oleg V. Kushnir Oleg V. Kushnir Ivan F. Tsymbal Ivan F. Tsymbal Janusz Lipkowski Janusz Lipkowski Alexander Shivanyuk Alexander Shivanyuk Vitaly I. Kalchenko Vitaly I. Kalchenko Selective Mono-O-acylation of <i>C</i><sub>2</sub><i><sub>V</sub></i>-Symmetrical Calix[4]arenediols with Acylisocyanates American Chemical Society 2004 Calix Acylisocyanate selectivity acylcarbamate fragments Intramolecular hydrogen bonds ether acylisocyanate Selective monoprotection monoacylated products 4 Symmetrical C 2 V steric effects 2004-08-05 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Selective_Mono_O_acylation_of_i_C_i_sub_2_sub_i_sub_V_sub_i_Symmetrical_Calix_4_arenediols_with_Acylisocyanates/3329866 Calix[4]arenedialkyl ethers <b>3</b> react with an excess of acylisocyanates to give selectively monoacylated products <b>4</b>. Intramolecular hydrogen bonds and steric effects of the acylcarbamate fragments are most likely responsible for the high selectivity of this monoprotection.