L S Povarov 1963 aza-Diels-Alder: imine + electron-rich olefin -> tetrahydroquinoline; modern asymmetric chiral-Brønsted-acid catalysis Akiyama-Terada 2004.
L S Povarov 1963 aza-Diels-Alder: imine + electron-rich olefin -> tetrahydroquinoline; modern asymmetric chiral-Brønsted-acid catalysis Akiyama-Terada 2004.