AUTHOR=Aricò Fabio TITLE=Editorial: Green Synthesis of Heterocycles JOURNAL=Frontiers in Chemistry VOLUME=8 YEAR=2020 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2020.00074 DOI=10.3389/fchem.2020.00074 ISSN=2296-2646