Synthesis of myo-inositol-1-phosphatase inhibitors in which the phosphate group is replaced by less polar groups

The phosphate group in the inositol-1-phosphatase inhibitor (1) is replaced by less polar phosphorus containing groups (substituted phosphate and phosphonates), by sulphur containing substituents (sulphate, sulphonamides) and by a carboxylate and carbamate. The effect of the replacement is studied on the enzyme myo-inositol-1-phosphatase.