137076-54-1, 2-(4,7,10-Tris(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetic acid is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated
A solution of 2-(1,4,7,10-tetraaza-4,7,10-tris{[(tert-butyl)oxycarbonyl]methyl}-cyclododecyl)acetic acid (68.7 mg, 0.120 mmol) in dry DMF (1.00 mL) was successively treated with HOBt (18.4 mg, 0.120 mmol) and EDC (22.9 mg, 0.120 mmol) at 22 C. After 0.5 h, the solution was treated with the product of Part 18A (40.8 mg, 0.100 mmol) and the resulting mixture stirred 0.5 h. The intermediate conjugate thus obtained was once again activated with EDC (22.9 mg, 0.120 mmol), then stirred 0.5 h before final treatment with MeONH2.HCl (10.0 mg, 0.120 mmol). After 1 h, the resulting mixture was diluted with EtOAc (100 mL) then transferred to a separatory funnel and successively washed with 0.1 M NaOH and saturated aqueous NaCl (3¡Á25 mL each). The EtOAc solution was dried over MgSO4, filtered and concentrated in vacuo to a colorless oil, which was used without further purification in the subsequent deprotection step.The protected conjugate (0.120 mmol theoretical) was dissolved in dioxane (1.00 mL) then successively treated with H2O (9 muL) and HCl (4.00 mmol; 1.00 mL of a 4 M solution in dioxane) at 22 C. The resulting pale yellow solution was stirred 14 h, during which time a heavy white precipitate formed. Upon complete deprotection, the volatiles were removed under a stream of N2 and the white solid residue redissolved in H2O containing 0.1% TFA (8.00 mL) then directly purified by HPLC on a Phenomenex Luna C18 column (21.2¡Á250 mm) using a 1%/min gradient from 0-30% MeCN containing 0.1% TFA and 10% H2O at 20 mL/min. The main product peak eluting at 11.5 min was collected and lyophilized to a white powder (12.8 mg, 13.4 mumol; 13.4%).
137076-54-1 2-(4,7,10-Tris(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetic acid 11606627, acatalyst-ligand compound, is more and more widely used in various.
Reference£º
Patent; Lantheus Medical Imaging, Inc.; Cesati, Richard R.; Harris, Thomas D.; Robinson, Simon P.; Looby, Richard J.; Cheesman, Edward H.; Yalamanchili, Padmaja; Casebier, David S.; (86 pag.)US9266846; (2016); B2;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI