Rhodium-Catalyzed Asymmetric Arylation of N-Tosyl Ketimines
摘要:
A rhodium-catalyzed addition of sodium tetraarylborates to N-tosyl ketimines is described. Highly efficient asymmetric catalysis has been achieved by employing a chiral diene ligand, constructing chiral amine derivatives possessing alpha-tetrasubstituted carbon stereocenters with high enantioselectivity.
作者:John T. Vandkberg、Carl E. Moore、Frank P. Cassaretto、Harvey Posvic
DOI:10.1016/s0003-2670(01)81750-5
日期:1969.1
synthesized by a new in situ method. Both salts formed precipitates with potassium, rubidium and cesium ions, quaternary ammonium and protonated basic nitrogen compounds. Potassium tetrakis(p-trifluoromethylphenyl) borate was more insoluble than potassium tetraphenylborate while cesium tetrakis (m-fluorophenyl) borate was less soluble than cesium tetrakis(p-fluorophenyl) borate. The salts formed with nitrogen-containing