Synfacts, Table of Contents Synfacts 2021; 17(11): 1265DOI: 10.1055/s-0041-1737040 Organo- and Biocatalysis Hydrogen Bonding Enables Highly Selective Norrish Type II Ring Contractions Contributor(s): Benjamin List , Benjamin Mitschke Recommend Article Abstract Buy Article Key words Key wordsNorrish Type II - photochemistry - chiral phosphoric acids - cyclopentanes Full Text