1,2-Dichloroethane → HCID 90412413, compound

Participants

Reaction Steps

N-hydroxysuccinimide (438 mg, 4.00 mmol) was added to a solution of crude 1-((4-(4-((1-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-3,19-dioxo-7,10,13,16-tetraoxa-4,20-diazatricosan-23-yl)oxy)benzoyl)phenyl)amino)-3,6,9,12-tetraoxapentadecan-15-oic acid (3.00 g) in anhydrous DCM (20 ml) was added followed by EDC (946 mg, 5.00 mmol). The reaction was stirred at r.t. for 2-3 hs. Upon completion, reaction was concentrated under reduced pressure and purified by silica gel chromatography (DCM to DCM:iPrOH gradient) to provide 2.15 g (2.12 mmol) of 2,5-dioxopyrrolidin-1-yl 1-((4-(4-((1-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)-3,19-dioxo-7,10,13,16-tetraoxa-4,20-diazatricosan-23-yl)oxy)benzoyl)phenyl)amino)-3,6,9,12-tetraoxapentadecan-15-oate as slightly yellow oil.

Provenance & Evidence