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Synlett 1997; 1997(9): 1067-1068
DOI: 10.1055/s-1997-1523
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A Convenient Synthesis of Two New Indoloquinoline Alkaloids

Géza Timári* , Tibor Soós, György Hajós
  • *Central Research Institute for Chemistry, Hungarian Academy of Sciences, H-1525 Budapest POB.17, Hungary, Fax: +36 13257554; e-mail timari@cric.chemres.hu
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Publication Date:
31 December 2000 (online)

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A concise synthesis of two new indoloquinoline-based alkaloids (1 and 2), isolated from Cryptolepis sanguinolenta, is reported. The palladium-catalyzed cross-coupling reaction of 3-bromoquinoline derivatives with N-pivaloylamine phenylboronic acid gave the corresponding biaryls from which the indoloquinoles could be synthesized.

Pd(0)-catalyzed cross-coupling - arylboronic acid - cryptosanguinolentine - cryptotackieine