Annulation of aromatic imines via directed C-H bond activation.
A directed C-H bond activation approach to the synthesis of indans, tetralins, dihydrofurans, dihydroindoles, and other polycyclic aromatic compounds is presented. Cyclization of aromatic ketimines and aldimines containing alkenyl groups tethered at the meta position relative to the imine directing group has been achieved using (PPh3)3RhCl (Wilkinson's catalyst). The cyclization of a range of aromatic ketimines and aldimines provides bi- and tricyclic ring systems with good regioselectivity. Different ring sizes and substitution patterns can be accessed through the coupling of monosubstituted, 1,1- or 1,2-disubstituted, and trisubstituted alkenes bearing both electron-rich and electron-deficient functionality.
Thalji
Reema K
RK
Department of Chemistry, University of California-Berkeley, and Division of Chemical Sciences, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Ahrendt
Kateri A
KA
Bergman
Robert G
RG
Ellman
Jonathan A
JA
D002244:Carbon / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D008635:Mescaline / Q000031:analogs & derivatives / Q000138:chemical synthesis
D007097:Imines; D002244:Carbon; D006859:Hydrogen; D008635:Mescaline