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'Indole Alkaloids' in keywords Facet   Publication Year 1978  [X]
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1978[X]
1Author    W. N. Speckamp, J. Dijkink, P. Pasman, J. C. HubertRequires cookie*
 Title    Indole [3,2 gjindolizidines via Sodium Borohydride Reduction of Indolic Imides  
 Abstract    Acid-controlled sodium borohydride reduc-tion of imides followed by cyclisation of the carbinol lactams formed affords the title compounds in good yields. 
  Reference    (Z. Naturforsch. 33b, 127—128 [1978]; received September 12 1977) 
  Published    1978 
  Keywords    Reduction, Imides, Cyclisation, Carbinol Lactam, Indole Alkaloids 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0127_n.pdf 
 Identifier    ZNB-1978-33b-0127_n 
 Volume    33 
2Author    Atta-Ur-Rahman, Sadiqa Firdous, Anwer BashaRequires cookie*
 Title    Alkaloids, IX* Some Aspects of the Chemistry of C atliar anthine  
 Abstract    Vinblastine and Vincristine are binary indole-indoline alkaloids occurring in traces in the leaves of Vinca rosea. They are among the most powerful chemotherapeutic agents available to man for the treatment of a variety of cancers. Their high cost and complexity of structure has attracted the attention of many eminent chemists towards their synthesis. The first synthesis of both these anta'-tumour alkaloids was reported by us last year [7] starting from two major alkaloids, catharanthine and vindo-line, which co-occur in the same plant. Some aspects of the chemistry of catharanthine are now presented including a novel one-step de-carbomethoxylation reaction with H2S in glacial acetic acid and a reversible isomerization of catharanthine with sodium borohydride. A study of the life-time of catharanthine in hot glacial acetic acid substantiates the earlier work of the Anglo-French group on the biosynthesis of indole alkaloids. 
  Reference    Z. Naturforsch. 33b, 469—470 (1978); received December 5 1977 
  Published    1978 
  Keywords    Vinblastine, Vincristine, Decarbomethoxylation, anti-Cancer Drugs, Indole Alkaloids 
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 TEI-XML for    default:Reihe_B/33/ZNB-1978-33b-0469_n.pdf 
 Identifier    ZNB-1978-33b-0469_n 
 Volume    33