1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 86676479, compound

Participants

Role	Name	HCID	Charge
Reactant	1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide	HCID 15908	—
Reactant	1-Hydroxybenzotriazole	HCID 75771	—
Reactant	Diisopropylethylamine	HCID 81531	—
Reactant	Fmoc-L-Lys-mono-amide-DOTA-tris(t-Bu ester)	HCID 12086117	—
Reactant	1,5-Bis(1,1-dimethylethyl) N-((((1S)-5-amino-1-((1,1-dimethylethoxy)carbonyl)pentyl)amino)carbonyl)-L-glutamate	HCID 25194225	—
Solvent	Dichloromethane	HCID 6344	—
Product	HCID 86676479	HCID 86676479	136%

Reaction Steps

A solution of (S)-di-tert-butyl 2-(3-((S)-6-amino-1-(tert-butoxy)-1-oxohexan-2-yl)ureido)pentanedioate (0.048 g, 0.10 mmol), (S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-6-(2-(4,7,10-tris(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetamido)hexanoic acid (56 mg, 0.0607 mmol), EDCI (19 mg, 0.10 mmol), HOBt (13.5 mg, 0.10 mmol) and DIPEA (0.10 mL) in DCM (5.0 mL) was stirred at room temperature for 2 hrs. The solvent was evaporated to give a residue, which was purified by Biotage eluting with DCM to 10% MeOH in DCM to give (5S,12S,16S)-tri-tert-butyl 1-(9H-fluoren-9-yl)-3,6,14-trioxo-5-(4-(2-(4,7,10-tris(2-(tert-butoxy)-2-oxo ethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetamido)butyl)-2-oxa-4,7,13,15-tetraazaoctadecane-12,16,18-tricarboxylate (115 mg) containing some impurity. MS (ESI), 697.0 (M+H)+.

Provenance & Evidence

DOI	10.6084/m9.figshare.5104873.v1
Patent number	US09388144B2
Source dataset	uspto-grants-2016_07
ORD ID	ord-d8907e4a7e134fc4a77e0710468bf5d2
Source note	uspto-grants-2016_07