The reaction of B-hexoses, D-pentose and organic pentacoordinate 1, 3, 2-di
oxaphospholene were investigated. The observation showed that there wa e ob
vious differences of reaction ratio, intermediate, and final products in th
e reactions between hexoses and pentose via pentacoordinate phosphorus comp
ound. The results should give significant clue to the metabolic mechanism o
f carbohydrate phosphate in nature.