Inside Back Cover: Upgrading Carbon Dioxide by Incorporation into Heterocycles (ChemSusChem 1/2015)

The Inside Back Cover picture shows the chemical transformation of CO 2 as an appealing tool for heterocycle synthesis through rationally designed substrates and subsequent intramolecular cyclization. This pattern of CO 2 fixation can be regarded as a “nucleophilic pathway”, avoiding use of stoichiometric organometallic reagents. With this strategy, either the entire “CO 2 ” moiety or “CO” fragment could be incorporated into a variety of heterocycles including cyclic carbamates, benzoxazine‐2‐one, 4‐hydroxyquinolin‐2‐one, quinazoline‐2,4(1 H ,3 H )‐diones, benzimidazolones, and α‐alkylidene cyclic carbonate. In their Minireview on page 52 (DOI: 10.1002/cssc.201402837 ), Yu et al. discuss strategies for upgrading CO 2 into value‐added heterocycles under mild conditions and potential utilization of CO 2 as an alternative and ideal sustainable C 1 synthon in organic synthesis rather than just being wasted.