The effect of chiral <i>N</i>-substituents with methyl or trifluoromethyl groups on the catalytic performance of mono- and bifunctional thioureas
作者:Josué Vazquez-Chavez、Socorro Luna-Morales、Diego A. Cruz-Aguilar、Howard Díaz-Salazar、Wilmer E. Vallejo Narváez、Rodrigo S. Silva-Gutiérrez、Simón Hernández-Ortega、Tomás Rocha-Rinza、Marcos Hernández-Rodríguez
DOI:10.1039/c9ob01893j
日期:——
thiourea organocatalysts that incorporate a chiral group which includes a trifluoromethyl moiety and contrasted their performance with non-fluorinated analogs. The comparison between such systems allows the direct study of the NH acidity of a thiourea bonded to an aliphatic substituent. In principle, –CF3 systems feature an enhanced hydrogen bond (HB) donor capacity that is undoubtedly beneficial for