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
The procedure that was followed was described in Li, C, et al., J. Am. Chem. Soc, 2006, 128, 15072-73. Compound 2-(4,7,10-Tris(2-(tert-butoxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl)acetic acid (400 mg, 0.70 mmol), N-hydroxysuccinimide (90.4 mg, 0.78 mmol, 1.1 equiv.), and O-benzotriazol-1-yl-N,N,N’,N-tetramethyluronium hexafluorophosphate (HBTU) (296 mg, 0.78 mmol, 1.1 equiv.) were dissolved in 10 mL of acetonitrile. The reaction was stirred at room temperature for 24 hr. After removing the solvent under vaccum, the crude product was purified by flash chromatography on silica gel (CH2Cl2/MeOH, 85:15) to give compound tri-tert-butyl 2,2′,2″-(10-(2-((2,5-dioxopyrrolidin-1-yl)oxy)-2-oxoethyl)-1,4,7,10-tetraazacyclododecane-1,4,7-triyl)triacetate as a white foam (404 mg, 86 %) Rf : 0.3 (CH2Cl2/MeOH, 85:15). 1H NMR (300MHz, CDCl3) delta 3.51 (br, 4H, H8), 3.54 (br, 4H, H13, H1′), 3.32-3.26 (m, 4H, H6), 3.08-2.99 (m, 4H, H5), 2.97-2.86 (m, 8H, H2, H3), 2.85 (s, H4′), 1.46 (s, 18H, H12), 1 .45 (s, 9H, H17). 13C NMR (75MHz, CDCl3) delta 173.4 (C9, C14), 173.1 (C2′), 169.9 (C3′), 82.6 (C16), 82.4 (C11), 55.8 (C8), 55.7 (C13), 54.2 (C1′), 54.1 -51 .5 (C2, C3), 51 .0-48.9 (C5, C6), 27.8 (C17), 27.6 (C12). 25.6 (C4′) MS (CI/NH3) m/z 692 [M + H]+
The synthetic route of 137076-54-1 has been constantly updated, and we look forward to future research findings.
Reference£º
Patent; INSTITUT CURIE; CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE; UNIVERSITE PIERRE ET MARIE CURIE (PARIS 6); FLORENT, Jean-Claude; AIT SARKOUH, Rafik; JOHANNES, Ludger; SCHMIDT, Frederic; OBERLEITNER, Birgit; DRANSART, Estelle; SEMETEY, Vincent; WO2014/86942; (2014); A1;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI