Synfacts, Table of Contents Synfacts 2022; 18(01): 0030DOI: 10.1055/s-0041-1737151 Synthesis of Materials and Unnatural Products Double π-Extended Helicenes via an Unsymmetrical Twofold Scholl CyclizationContributor(s): Timothy M. Swager , Tiffany Q. ChenRecommend Article Abstract Buy ArticleKey words Key wordshelical structures - cyclization - polycyclic aromatic hydrocarbons Full Text