Danuphylline, a novel pentacyclic indole from Kopsia

Tetrahedron Letters

Volumn 39, Issue 32, 1998, Pages 5823-5826

  Kam, Toh Seok ^a   Lim, Tuck Meng ^a   Choo, Yeun Mun ^a   Subramaniam, G ^a  

^a UNIVERSITY OF MALAYA   (Malaysia)

Author keywords

[No Author keywords available]

Indexed keywords

DANUPHYLLINE; INDOLE DERIVATIVE; UNCLASSIFIED DRUG;

ARTICLE; CARBON NUCLEAR MAGNETIC RESONANCE; DRUG SYNTHESIS; NONHUMAN; PLANT LEAF; SPECTROSCOPY; STRUCTURE ANALYSIS; ULTRAVIOLET RADIATION;

EID: 0032490969     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0040-4039(98)01150-2     Document Type: Article

References (10)

1. 1. Kam, T. S. and Subramaniam, G. Natural Prod. Lett., 1998, 11, 131.
2. 8, 470.1689).
3. 3. Andriamialisoa, R. Z., Langlois, N., Potier, P., Chiaroni, A. and Riche, C. Tetrahedron, 1978, 34, 677.
4. 4. Chen, W. S., Li, S. H., Kirfel, A., Will, G., Breitmaier, E. Liebigs Ann. Chem., 1981, 1886.
5. 5. Kam, T. S., Tan, P. S., Hoong, P. Y. and Chuah, C. H. Phytochemistry, 1993, 32, 489.
6. 6. Kam, T. S., Yoganathan, K. and Chen Wei, Tetrahedron Lett., 1996, 37, 3603.
7. 7. Kam, T. S., Yoganathan, K., Chuah, C. H. and Chen Wei, Phytochemistry, 1993, 32, 1343.
8. 8. In the spectrum obtained at ambient temperature there is no evidence of the presence of a second rotamer. The spectrum obtained at 55 °C was essentially unchanged indicating the barrier to rotation to be rather high.
9. 9. Murugesan, N. and Shamma, M. Heterocycles, 1981, 16, 257.
10. 10. Tan, G. H., Lim, T. M. and Kam, T. S. Tetrahedron Lett., 1995, 36, 1327.