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Volumn , Issue 18, 2007, Pages 1825-1827

Asymmetric transfer hydrogenation over Ru-TsDPEN catalysts supported on siliceous mesocellular foam

Author keywords

[No Author keywords available]

Indexed keywords

AMINE; IMINE; KETONE DERIVATIVE; RUTHENIUM DERIVATIVE; RUTHENIUM N (4 TOLUENESULFONYL) 1,2 DIPHENYLETHYLENEDIAMINE; SILICON DIOXIDE; UNCLASSIFIED DRUG;

EID: 34248163109     PISSN: 13597345     EISSN: None     Source Type: Journal    
DOI: 10.1039/b615564b     Document Type: Article
Times cited : (53)

References (37)
  • 29
    • 6344276857 scopus 로고    scopus 로고
    • Mesoporous MCM-41 and SBA-15 were reported to be worse supports for the Ru-TsDPEN catalyst than silica gel in the asymmetric transfer hydrogenation
    • P. N. Liu J. G. Deng Y. Q. Tu S. H. Wang Chem. Commun. 2004 2070
    • (2004) Chem. Commun. , pp. 2070
    • Liu, P.N.1    Deng, J.G.2    Tu, Y.Q.3    Wang, S.H.4
  • 33
    • 0344944866 scopus 로고    scopus 로고
    • The N/S molar ratio for N-sulfonylated-1,2-diamine should be 2, but the elemental analysis of ligand 3 showed a N/S molar ratio of 1.8 (see ESI). The slight reduction in the N/S molar ratio could be due to the formation of small amounts of the N,N′-disulfonylated-1,2-diamine compound (which has a N/S molar ratio of 1) on MCF. Although an excess of 1,2-diphenylethylenediamine was used to react with 4-ethyl benzenesulfonyl chloride immobilized on MCF to suppress the formation of N,N′-disulfonylated-1,2-diamine, the latter was still found in small quantities on the high surface area MCF support. Consequently, catalyst 6 likely involved Ru supported by a mixture of N-sulfonylated-1,2-diphenylethylenediamine and N,N′-disulfonylated-1,2- diphenylethylenediamine ligands, giving a similar enantioselectivity but lower reactivity compared to the homogeneous Ru-TsDPEN catalyst A minimum of three batches of each catalyst (4, 5 and 6) were prepared, and consistent reactivities
    • G. D. Williams R. A. Pike C. E. Wade M. Wills Org. Lett. 2003 5 4227
    • (2003) Org. Lett. , vol.5 , pp. 4227
    • Williams, G.D.1    Pike, R.A.2    Wade, C.E.3    Wills, M.4


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.