1,4,5,6-Tetra-O-acetyl-myoinositol is reacted with N,N′-thiocarbonyl diimidazole to give 1,4,5,6-tetra-O-acetyl-myoinositol-2,3-thionocarbonate. This is desulfurized with trimethyl phosphite to yield tetra-O-acetyl-(±)-cyclohexene-1,3/2,4-tetrol (tetra-O-acetyl-conduritol-B).