1,2-Dichloroethane → HCID 86295410, compound

Participants

Reaction Steps

To a solution of crude 1-((4-(4-((5,21-dioxo-25-(2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)-8,11,14,17-tetraoxa-4,20-diazapentacosyl)oxy)benzoyl)phenyl)amino)-3,6,9,12-tetraoxapentadecan-15-oic acid (1.85 g, 1.89 mmol) in anhydrous DCM (43.0 ml) was added N-hydroxysuccinimide (239 mg, 2.08 mmol) followed by EDC (471 mg, 2.46 mmol). The reaction was stirred at r.t. for 4 hs. Upon completion, reaction was concentrated under reduced pressure and purified by silica gel chromatography (DCM to DCM:iPrOH, gradient) to provide 2,5-dioxopyrrolidin-1-yl 1-((4-(4-((5,21-dioxo-25-(2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)-8,11,14,17-tetraoxa-4,20-diazapentacosyl)oxy)benzoyl)phenyl)amino)-3,6,9,12-tetraoxapentadecan-15-oate as slightly yellow oil.

Provenance & Evidence