Azido-PEG3-phosphonic acid ethyl ester → Diethyl 2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethylphosphonate
Reaction equation
[N:1]([CH2:4][CH2:5][O:6][CH2:7][CH2:8][O:9][CH2:10][CH2:11][O:12][CH2:13][CH2:14][P:15](=[O:22])([O:19][CH2:20][CH3:21])[O:16][CH2:17][CH3:18])=[N+]=[N-]>CCO.[OH-].[OH-].[Pd+2]>[NH2:1][CH2:4][CH2:5][O:6][CH2:7][CH2:8][O:9][CH2:10][CH2:11][O:12][CH2:13][CH2:14][P:15](=[O:22])([O:16][CH2:17][CH3:18])[O:19][CH2:20][CH3:21]Participants
4
Reactant 1
Product 1
Reagents, catalysts & solvents 2
Procedure
To a solution of diethyl 2-(2-(2-(2-azidoethoxy)ethoxy)ethoxy)ethylphosphonate (1 eq) in EtOH (0.1 M) was added Pd(OH)2 (0.05 eq). The reaction mixture was stirred under hydrogen (1 atm) for 4 hours. The mixture was filtered through Celite and washed with MeOH. The solvent was removed en vaccuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-10% MeOH/DCM with 0.5% NH3 to give the product as a colorless oil.