EXPERIMENTAL The general procedure for preparing targets 5a-d and 10a-f A mixture of tetraethylene glycol 1 (10 mmol), tosyl chloride (30 mmol) and triethylamine (50 mmol) in DCM (100 mL) was stirred at room temperature overnight, and then concentrated under reduced pressure. The residue was purified by silica gel chromatography eluted with PE:EA=1:2 to give the intermediate 2. 202