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Volumn 61, Issue 43, 2005, Pages 10216-10226

Atom-transfer radical reactions catalyzed by a coordinatively unsaturated diruthenium amidinate, [(η5-C5Me5) Ru(μ2-i-PrNC(Me)Ni-Pr)Ru(η5-C5Me 5)]+

Author keywords

Amidinate; Coordinatively unsaturated complex; Polymerization; Radical Cyclization; Ruthenium

Indexed keywords

2 BROMOISOBUTYLATE; ACETAMIDE DERIVATIVE; ALKENE DERIVATIVE; BROMIDE; BUTYLATE; CARBON; CATION; COPOLYMER; DIRUTHENIUM AMIDINATE; GAMMA LACTAM DERIVATIVE; HALIDE; METHACRYLIC ACID METHYL ESTER; POLY(METHYL METHACRYLATE); POLY(TETRAHYDROFURAN); RUTHENIUM DERIVATIVE; SODIUM DERIVATIVE; TETRAHYDROFURAN DERIVATIVE; UNCLASSIFIED DRUG;

EID: 25144496096     PISSN: 00404020     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tet.2005.08.037     Document Type: Article
Times cited : (46)

References (65)
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    • Controlled Radical Polymerization
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    • K. Matyjaszewski Controlled Radical Polymerization ACS Symposium Series 685 1998 American Chemical Society Washington
    • (1998) ACS Symposium Series 685
    • Matyjaszewski, K.1
  • 45
    • 0027503663 scopus 로고
    • It is known that equilibrium between the trans- and cis-isomers of this type of compounds easily took place in the presence of transition metal complexes over 80°C, and the thermodynamically controlled ratio of trans-6g to cis-6g reached ca. 4:1: (a) G.A. Sloigh Tetrahedron Lett. 34 1993 6825
    • (1993) Tetrahedron Lett. , vol.34 , pp. 6825
    • Sloigh, G.A.1
  • 47
    • 25144435037 scopus 로고    scopus 로고
    • note
    • DFT calculations (Ref. 15) (B3LYP/6-311++G(2d,p)//B3LYP/6-31G(d) level) of cis-6g and trans-6g were carried out to show that the trans-6g proved to be slightly stable (2.75 kJ/mol) than the cis-isomer.
  • 49
    • 25144508968 scopus 로고    scopus 로고
    • Cu/bipyridine catalyst, see Ref. 17b.
    • (b) Cu/bipyridine catalyst, see Ref. 17b.
  • 51
    • 25144443692 scopus 로고    scopus 로고
    • note
    • n (1.2 in toluene) at the initial stage (<10% conversion), however, such relationship gradually deviates from the linearity because of the decomposition of the catalyst.
  • 57
    • 25144469454 scopus 로고    scopus 로고
    • note
    • Matyjaszewski reported the polymerization of MMA with CuBr/dNbipy [dNbipy=4,4′-di(5-nonyl)-2,2′-bipyridine] using poly(THF)-derived bromopropionate as the initiator, in which the temperature over 90°C (24 h, >97% conversion) was required for the reaction (Ref. 24b).
  • 58
    • 25144468979 scopus 로고    scopus 로고
    • note
    • The reason why the conversion of MMA reached over 95% in the polymerization using poly(THF)-derived initiator 9b is not clear at present. We assumed that the polyether moiety of both the initiator 9b and the dormant chain might effectively stabilize the highly reactive diruthenium amidinate 4 with an oxophilic nature.
  • 59
    • 25144481452 scopus 로고    scopus 로고
    • note
    • ns; this strongly suggests interaction of the radical species at the polymer end with the metallic species leading to abstraction of the halogen atom from the M-X species by the polymer radical. As a consequence of the first and the second points, other two reactions, ATRA and ATRC, should also be promoted by the redox mechanism not involving the free radical chain process.
  • 64
    • 27744438489 scopus 로고    scopus 로고
    • Rigaku and Rigaku/MSC (2000-2004); 9009 New Trails: Dr. The Woodlands TX 77381, USA.
    • CrystalStructure 3.6.0: Crystal Structure Analysis Package, Rigaku and Rigaku/MSC (2000-2004); 9009 New Trails: Dr. The Woodlands TX 77381, USA.
    • CrystalStructure 3.6.0: Crystal Structure Analysis Package


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.