Highly Regioselective Direct C-H Arylation:Facile Construction of Symmetrical Dithienophthalimide-Based л-Conjugated Molecules for Optoelectronics

摘要

Controllable direct C-H arylation with high regioselectivity is highly desirable yet remains a formidable challenge.Herein,a facile regioselective direct C-H arylation is developed for efficient construction of a variety of symmetrical dithienophthalimide-based n-conjugated molecules.The resulting methodology is applicable to a wide range of substrates,from electron-rich units to electron-deficient units with large steric end groups.Aryl halides have been confirmed to be able to couple with dithienophthalimide(DTI)via direct C-H arylation,showing high regioselectivity.Varying the functional end groups onto the DTI core has been demonstrated to fine tune the emission colors to cover most of the visible spectra.The results suggest a facile strategy towards highly selective direct C-H arylation,opening the prospects towards efficient construction of 7r-conjugated molecules for various potential optoelectronic applications.