OBSOLETE. The chemical reactions and pathways resulting in the formation of 1D myo-inositol 1,2,3,4,5,6-hexakisphosphate, phytate, by a pathway using inositol 1,4,5-trisphosphate produced from phosphatidylinositol 4,5-biphosphate hydrolysis by phospholipase C; in this pathway, inositol 1,4,5-trisphosphate is successively phosphorylated to yield inositol hexakisphosphate.