Ia. Rivero et al., IMPROVED SYNTHESES OF PEPTIDE COUPLING REAGENTS BOP AND PYBOP USING TRIPHOSGENE, Synthetic communications, 25(14), 1995, pp. 2185-2188
Synthesis of Benzotriazolyloxy tris [dimethylamino] phosphonium hexafl
uorophosphate (BOP) and Benzotriazolyloxy tris [pyrrolidino] phosphoni
um hexafluorophosphate (PyBOP), using triphosgene and hydroxybenzotria
zole.