Peptide Coupling Reagents; VIII. A High Yield Preparation of Phenyl Esters of Amino Acids using Benzotriazolyloxytris[dimethylamino]phosphonium Hexafluorophosphate (BOP Reagent) - CASTRO, Bertrand; EVIN, Geneviève; SELVE, Claude; SEYER, René (Synthesis, 1977)