Kn. Singh, 2-(O-TOLYL)-4,4-DIMETHYL-2-OXAZOLINES - A NEW VEHICLE FOR FACILE CONVERGENT SYNTHESIS OF PROTOBERBERINE ALKALOIDS, Tetrahedron letters, 39(24), 1998, pp. 4391-4392
A single step synthesis of 8-oxotetrahydroprotoberberines (57-82%) by
the addition of lithiated 2-(o-tolyl)-4,4-dimethyl-2-oxazolines on 3,4
-dihydroisoquinolines is described. (C) 1998 Elsevier Science Ltd. All
rights reserved.