Synthesis of novel chiral quaternary phosphonium fluorides: reagents for simple asymmetric nucleophilic fluorination reactions
摘要:
The novel chiral quaternary salt (R-P)-benzylmenthylmethylphenylphosphonium fluoride was synthesised. The compound was used in the asymmetric nucleophilic fluorination of 2-bromopropiophenone to give 7-fluoropropiophenone in a 35% yield with [alpha](D)(20) = +1.94 degrees. (C) 2001 Elsevier Science B.V. All rights reserved.