Complete Catalytic Deoxygenation of CO2 into Formamidine Derivatives

C1, seen them all: A catalytic transformation that uses CO2 as an oxygen-free C1 building block is presented. The reductive functionalization of CO2 is promoted by N-heterocyclic carbenes or guanidines as organocatalysts in the presence of amines and hydrosilanes. This diagonal strategy selectively affords benzimidazoles, quinazolinones, 3,4-dihydroquinazolines, formamidines, and their derivatives, directly from CO2 under mild conditions. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.