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Cover Picture: Metal‐Free Catalytic Hydrogenation (Angew. Chem. Int. Ed. 42/2007)
Author(s) -
Chase Preston A.,
Welch Gregory C.,
Jurca Titel,
Stephan Douglas W.
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200790210
Subject(s) - cover (algebra) , transition metal , steric effects , phosphonium , chemistry , catalysis , path (computing) , metal , polymer chemistry , organic chemistry , computer science , engineering , mechanical engineering , programming language
Off the beaten path … … aptly describes a main‐group alternative for catalyzing hydrogenation reactions using H 2 . Whereas the main road is based on transition metals, D. W. Stephan and co‐workers offer a new path in their Communication on page 8050 ff. with metal‐free phosphonium borates, which effect the reduction of sterically hindered imines and aziridines under relatively mild conditions. The cover picture illustrates this alternative but parallel route with the bicycle and pedestrian paths of the “Promenade” in Münster, Germany.