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'Alkylcobalamins' in keywords Facet   section ZfN Section B  [X]
Facet   Publication Year 1980  [X]
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1980[X]
1Author    Abdussalam Maihub, HuiBi Xu, GerhardN. SchrauzerRequires cookie*
 Title    Studies on Vitamin B12 and Related Compounds, 51 [1] Direct Syntheses of Alkylcobalamins from Alkanes and Vitamin B12r under "Oxidizing-Reducing" Conditions  
 Abstract    Syntheses of methylcobalamin from methane, and of n-alkylcobalamins from n-alkanes (C2 C10) and vitamin Bi2r are described. The compounds are formed under "oxidizing-reducing" conditions: Oxygen radicals (02~, HOO -, and HO') are generated from the reaction of O2 with reducing metal ions, notably V +3 (aq) and abstract hydrogen from the alkane substrates. The resulting alkyl radicals are captured by vitamin Bj2r with high efficiency to yield alkylcobalamins. The reactions take place at room temperature in mildly alkaline or acidic solutions. In addition to n-alkylcobalamins, the preparation of neopentylcobalamin from neopentane, of isobutylcobalamin from isobutane, and of several cycloalkylcobalamins from cycloalkanes, is also reported. Methyl radicals generated in D20 from CH4 under "oxidizing-reducing" conditions are reduced to yield CH3D. 
  Reference    Z. Naturforsch. 35b, 1435—1438 (1980); received April 25 1980 
  Published    1980 
  Keywords    Alkylcobalamins, Synthesis, Alkanes 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-1435.pdf 
 Identifier    ZNB-1980-35b-1435 
 Volume    35