Mesoionic 1,3-oxazolium-5-olates (münchnones) react with thiocoumarins having an electron-withdrawing group at the 3-position to afford stereodefined fused polycyclic thienopyrroles. The reaction sequence seems to be triggered by a regiospecific dipolar cycloaddition followed by ring opening of the initial 1:1 cycloadduct and intramolecular rearrangement with an unusual ring contraction.
Fabrication of egg shell-like nanovesicles from a thiocoumarin-based ε-amino ester: a potential carrier
作者:Mintu Debnath、Supriya Sasmal、Debasish Haldar
DOI:10.1039/c7tb00025a
日期:——
crystallography reveals that the ε-amino ester adopts a planar structure and self-associates to form a four-membered ring-like porous architecture through multiple N–H⋯O and C–H⋯S intermolecularhydrogenbonding interactions. At higher order packing, the ε-amino ester forms an anti parallel sheet-like structure by intermolecularhydrogenbonding as well as face-to-face π–π stacking interactions. Field emission
Silver-Mediated Oxidative Decarboxylative Trifluoromethylthiolation of Coumarin-3-carboxylic Acids
作者:Minghao Li、Jeffrey L. Petersen、Jessica M. Hoover
DOI:10.1021/acs.orglett.6b03806
日期:2017.2.3
organic compounds, in particular heterocycles, is important because of the prevalence of these structures in medicinally and agriculturally relevant molecules. Herein, the silver-mediatedoxidative decarboxylative trifluoromethylthiolation of coumarin-3-carboxylic acids is reported. This methodology utilizes existing carboxylic acid functionalities for the direct conversion to CF3S groups and results in