Calix[4]resorcinarene 、 alkaline earth salt of/the/ methylsulfuric acid 以
1,4-二氧六环 为溶剂,
以77%的产率得到1,21,23,25-tetramethyl-5,9,13,17-tetramethoxy-2,20:3,19-dimetheno-1H,21H,23H,25H-bis[1,3,2λ
5]dioxaphosphocino[5,4-i:5',4'-i']benzo[1,2-d:1',2'-d']bis[1,3,2λ
5]benzodioxaphosphocine