... Journal of the ... Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto ... Phosphoric acid D1 was also silylated, and new signals at 28.3 ppm (J Si–P = 4.5 Hz, 29 Si NMR) and −8.6 ppm ( 31 P NMR) were observed.(14) As a result, only thiophosphoramide B1 was ...