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Volumn 42, Issue 3, 2003, Pages 308-311

A catalytic approach to (R)-(+)-muscopyridine with integrated "self-clearance"

Author keywords

Cross coupling; Iron; Macrocycles; Metathesis; Ruthenium

Indexed keywords

MIXTURES; REACTION KINETICS;

EID: 0037455149     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200390103     Document Type: Article
Times cited : (227)

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    • note
    • The synthesis described by Kumada et al. that is based on a "stitching" cross-coupling reaction is seemingly one-step; this step, however, affords only 20% yield and the preparation of the aliphatic segment in racemic form requires four additional steps, the yields of which were not specified (see footnote 10 in ref. [5b]).
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    • In contrast, macrocyclic alkenes are not inert to the more active "second-generation" ruthenium catalysts. While in the present case this leads to undesirable polymerization, it is possible to use this ability to advantage: a) A. B. Smith, C. M. Adams, S. A. Kozmin, J. Am. Chem. Soc. 2001, 123, 990-991; b) A. Fürstner, O. R. Thiel, L. Ackermann, Org. Lett. 2001, 3, 449-451; c) C. W. Lee, R.H. Grubbs, Org. Lett. 2000, 2, 2145-2147; d) A. Fürstner, O. R. Thiel, N. Kindler, B. Bartkowska, J. Org. Chem. 2000, 65, 7990-7995.
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    • In contrast, macrocyclic alkenes are not inert to the more active "second-generation" ruthenium catalysts. While in the present case this leads to undesirable polymerization, it is possible to use this ability to advantage: a) A. B. Smith, C. M. Adams, S. A. Kozmin, J. Am. Chem. Soc. 2001, 123, 990-991; b) A. Fürstner, O. R. Thiel, L. Ackermann, Org. Lett. 2001, 3, 449-451; c) C. W. Lee, R.H. Grubbs, Org. Lett. 2000, 2, 2145-2147; d) A. Fürstner, O. R. Thiel, N. Kindler, B. Bartkowska, J. Org. Chem. 2000, 65, 7990-7995.
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    • In contrast, macrocyclic alkenes are not inert to the more active "second-generation" ruthenium catalysts. While in the present case this leads to undesirable polymerization, it is possible to use this ability to advantage: a) A. B. Smith, C. M. Adams, S. A. Kozmin, J. Am. Chem. Soc. 2001, 123, 990-991; b) A. Fürstner, O. R. Thiel, L. Ackermann, Org. Lett. 2001, 3, 449-451; c) C. W. Lee, R.H. Grubbs, Org. Lett. 2000, 2, 2145-2147; d) A. Fürstner, O. R. Thiel, N. Kindler, B. Bartkowska, J. Org. Chem. 2000, 65, 7990-7995.
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    • In contrast, macrocyclic alkenes are not inert to the more active "second-generation" ruthenium catalysts. While in the present case this leads to undesirable polymerization, it is possible to use this ability to advantage: a) A. B. Smith, C. M. Adams, S. A. Kozmin, J. Am. Chem. Soc. 2001, 123, 990-991; b) A. Fürstner, O. R. Thiel, L. Ackermann, Org. Lett. 2001, 3, 449-451; c) C. W. Lee, R.H. Grubbs, Org. Lett. 2000, 2, 2145-2147; d) A. Fürstner, O. R. Thiel, N. Kindler, B. Bartkowska, J. Org. Chem. 2000, 65, 7990-7995.
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    • Studiengesellschaft Kohle mbH. Us Patent 5,936,100 1999 (priority December 16 1996)
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  • 50
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    • For previous examples of tandem RCM/hydrogenation catalysis by ruthenium-carbene complexes see: a) A. Fürstner, K. Langemann, N. Kindler Studiengesellschaft Kohle mbH. US Patent 5, 936, 100 1999 (priority December 16, 1996); b) J. Louie, C. W. Bielawski, R. H. Grubbs, J. Am. Chem. Soc. 2001, 123, 11312-11313.
    • (2001) J. Am. Chem. Soc. , vol.123 , pp. 11312-11313
    • Louie, J.1    Bielawski, C.W.2    Grubbs, R.H.3
  • 51
    • 0001457311 scopus 로고
    • Insertion of Mg into commercial 6-bromo-1-hexene is accompanied by partial cyclization to give (cyclopentylmethyl)magnesium bromide in addition to the desired 5-hexenylmagnesium bromide, see D. Lal, D. Griller, S. Husband, K. U. Ingold, J. Am. Chem. Soc. 1974, 96. 6355-6357. The side products resulting thereof are easily eliminated by flash chromatography and the yield of 14 refers to analytically pure product.
    • (1974) J. Am. Chem. Soc. , vol.96 , pp. 6355-6357
    • Lal, D.1    Griller, D.2    Husband, S.3    Ingold, K.U.4


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