The syntheses are described of the 1-O-carbamoyl (11), 1-O-carbamoyl-2-O-stearoyl (10), 1-O-(acetylcarbamoyl)-2-O-stearoyl (12), 1-O-(heptylcarbamoyl) (13), 2-O-(heptylcarbamoyl) (14) 1,2-di-O-(heptylcarbamoyl) (15), and 1-O-(octadecylcarbamoyl) (16) derivatives of myo-inositol. None of these compounds had significant activity against phospholipase C.