Regioselective Synthesis of Nanographenes by Photochemical Cyclodehydrochlorination.

摘要: Novel nanographenes were prepared by a photochemical cyclodehydrochlorination (CDHC) reaction. Chlorinated precursors irradiated in acetone the presence of base or pure benzene and underwent multiple (up to four) regioselective cyclization reactions provide rigid π-conjugated molecules. Pure compounds recovered good yields simple filtration at end The CDHC reaction showed compatibility with both electron-poor electron-rich substrates, thus allowing synthesis pyridine- thiophene-fused nanographenes. It also enabled sterically hindered contorted molecules without causing full aromatization. A kinetic study that under conditions used is very fast process, some are completed within minutes. shows great potential as an alternative other involving harsher for preparation