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Volumn , Issue 13, 2007, Pages 1984-1994

Synthesis of (-)-N-acetylslaframine by C-1, C-5 bis-hydroxyalkylation of (5)-2-(N,N-dibenzylamino)-1,5-pentanediol via highly diastereoselective lithiation of the dicarbamate

Author keywords

( ) sparteine; Chiral 2 amino 1 alkanediols; Diastereoselectivity; Indolizidines; Lithiated dicarbamates

Indexed keywords

ALKANEDIOLS; DIASTEREOSELECTIVITY; INDOLIZIDINES; LITHIATED DICARBAMATES; SPARTEINE;

EID: 34447532149     PISSN: 00397881     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2007-983724     Document Type: Article
Times cited : (8)

References (45)
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    • Since polymerisation of ethylene oxide competes with substitution, the yields vary strongly when changing the reaction conditions.
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    • X-ray crystal data for 20; empirical formula C23H 41N3O5; formula weight 439.59; colourless crystal; crystal size 0.30 x 0.15 x 0.15 mm; crystal system, monoclinic; Z, 2; space group P21 (no. 4, unit cell dimensions a, 5.831 (1) A, b, 31.008 (1) Å, c, 7.542 (1) Å, β, 112.66 (1)°; V, 1258.4 (3) Å3; D(calculated, 1.160 g/cm3; absorption coefficient 0.657 mm -1; empirical absorption correction (0.827 ≤T ≤0.908, λ, 1.54178 Å; T, 223 K; ω and φ scans; 3453 reflections collected (±h, ±k, ±l, sinθ)/λ, 0.58 Å-1; 2029 independent (Rint, 0.037) and 1616 observed reflections [I 2 sigma (I, 288 refined parameters; R, 0.047, wR2, 0.128; Flack parameter 0.2 4, max. r
    • 3; Hydrogen atoms calculated and refined as riding atoms. Data set was collected with a Nonius KappaCCD diffractometer. (a) Data collection, COLLECT: Nonius B. V. 1998.
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    • Graphics, SCHAKAL: Keller, E., Universität Freiburg, Germany, 1997. CCDC 637855 contains the supplementary crystallographic data for this paper. This data can be obtained free of charge at www.ccdc.cam.ac.uk/ conts/retrieving.html or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, UK; fax: +44(1223)336033, E-mail: deposit@ccdc.cam.ac.uk.
    • (f) Graphics, SCHAKAL: Keller, E., Universität Freiburg, Germany, 1997. CCDC 637855 contains the supplementary crystallographic data for this paper. This data can be obtained free of charge at www.ccdc.cam.ac.uk/ conts/retrieving.html or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge, CB2 1EZ, UK; fax: +44(1223)336033, E-mail: deposit@ccdc.cam.ac.uk.
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    • 3 was necessary. Otherwise, signal broadening or the signal set of a second compound (presumably the slowly exchanging ammonium salt of 2) appears.
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    • 4
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