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Volumn 63, Issue 1, 2007, Pages 204-214

Synthesis of a tricyclic tetraazatriacetic ligand for gadolinium(III) as potential contrast agent for MRI

Author keywords

Contrast agent for MRI; Gadolinium complex; Macrocyclic polyaza polycarboxylic acid; PCTA12 derivative

Indexed keywords

3,10,13,19 TETRAAZA TRICYCLO[13.3.1.0 4.9 ]NONADECA 1(19),15,17 TRIENE 3,10,13 TRIACETIC ACID; AMINE; CONTRAST MEDIUM; ETHYLENE; GADOLINIUM;

EID: 33751579155     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2006.10.024     Document Type: Article
Times cited : (21)

References (39)
  • 18
    • 33751560853 scopus 로고    scopus 로고
    • Bridger, G.; Skerlj, R.; Kaller, A.; Harwig, C.; Bogucki, D.; Wilson, T. R.; Crawford, J.; McEachern, E. J.; Atsma, B.; Nan, S.; Zhou, Y.; Schols, D. PCT Int. Appl., WO0056729, 2000.
  • 23
    • 33751572549 scopus 로고    scopus 로고
    • Aicher, T. D.; Chen, Z.; Chen, Y.; Faul, M. M.; Krushinski, J. H., Jr.; Le Huerou, Y.; Pineiro-Nunez, M. M.; Rocco, V. P.; Ruley, K. M.; Schaus, J. M.; Thompson, D. C.; Tupper, D. E. PCT Int. Appl., WO03082877, 2003.
  • 24
    • 33751576627 scopus 로고    scopus 로고
    • Johnson, F.; Gupta, R. C. PCT Int. Appl., WO9852552, 1998.
  • 26
    • 33751579199 scopus 로고    scopus 로고
    • note
    • 2), 170.7 (CO) ppm.
  • 27
    • 33751577236 scopus 로고    scopus 로고
    • note
    • 2+ (5%).
  • 29
    • 33751583546 scopus 로고    scopus 로고
    • note
    • +.
  • 30
    • 33751564140 scopus 로고    scopus 로고
    • note
    • 13C NMR spectra of the expected product 18 obtained later from Route B proved to be identical to these ones. Moreover, the m/z 489 signal corresponding to the di-N-alkylated product was also present, but in lesser abundance (<5%), in the low-resolution mass spectrum of product 18 obtained from Route B. These results led us to conclude that, at least, a part of the m/z 489 signal may result from a fragmentation process during the mass spectrometric analysis. In this case, a prolonged reaction with other portions of alkylating agent and base would probably have led to the tri-N-alkylated product 18 exclusively.
  • 31
    • 33751559083 scopus 로고    scopus 로고
    • note
    • By using a 2-fold excess of alkylating agent, the reaction was rendered regioselective as the mono-N-alkylated product 21 was isolated in 88% yield.
  • 34
    • 33751558869 scopus 로고    scopus 로고
    • note
    • + (97%).
  • 35
    • 33751555963 scopus 로고    scopus 로고
    • Nachman, I.; Port, M.; Raynal, I.; Rousseaux, O. PCT Int. Appl., WO03074523, 2003.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.