Please do not adjust marginsPlease do not adjust margins dioxane and 0.5mL MeOH was stirred for 2 minutes. Then, the solution was irradiated in the microwave while stirring for 4 hours at 95ºC using dynamic mode and then evaporated under vacuum. The residue was dissolved in dichloromethane, washed with brine solution and dried over MgSO 4 , filtered, and evaporated under vacuum. The crude was purified by automated chromatography. The solvent system (in column volumes) used was the following: 5CV (99:1= EtoAc:MeOH), 5CV (98:2= EtoAc: MeOH), 5CV (100% DCM) to give 6 (1.1g, 82%) as a white solid.1 H NMR (400 MHz, CDCl 3 ) δ 3.72 (br, 144H, NCH 2 CH 2 NBoc, NCH 2 CH 2 N), 3.66-3.53 (m, 180H, CH 2 OCH 2 CH 2 OCH 2 CH 2 OCH 2 ), 3.45 (br, 156H, C 3 N 3 -NHCH 2 CH 2 CH 2 O, BocNCH 2 CH 2 N), 1.86 (m, 60H, OCH 2 CH 2 CH 2 NH), 1.47 (s, 216H, C(CH 3 ) 3 );

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