Carbazole-pyranocoumarin dimer and binary carbazole alkaloid from Clausena excavata

Tetrahedron Letters

Volumn 37, Issue 43, 1996, Pages 7819-7822

  Wu, Tian Shung ^a   Huang, Shiow Chyn ^b   Wu, Pei Lin ^a  

^a NATIONAL CHENG KUNG UNIVERSITY   (Taiwan)

^b CHIA NAN UNIVERSITY OF PHARMACY AND SCIENCE   (Taiwan)

Author keywords

[No Author keywords available]

Indexed keywords

ALKALOID; CARBAZOLE DERIVATIVE; CARBAZOMARIN A; CLAUSENAMINE A; UNCLASSIFIED DRUG;

ARTICLE; CRYSTALLOGRAPHY; DRUG ISOLATION; DRUG STRUCTURE; MASS SPECTROMETRY; NUCLEAR MAGNETIC RESONANCE; PHYTOCHEMISTRY; ULTRAVIOLET SPECTROPHOTOMETRY;

CLAUSENA EXCAVATA; EXCAVATA;

EID: 16044373462     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/0040-4039(96)01741-8     Document Type: Article

References (8)

1. 1. Wu, T. S.; Huang, S. C.; Wu, P. L.; Lee, K. H. Bioorg. Med. Chem. Lett. 1994, 4, 2395.
2. 2. Wu, T. S.; Huang, S. C; Lai, J. S.; Teng, C. M.; Ko, F. N.; Kuoh, C. S. Phytochemistry 1993, 32, 449.
3. 3. Wu, T. S.; Huang, S. C. Chem. Pharm. Bull. 1992, 40, 1069.
4. 4. Wu, T. S.; Furukawa, H J. Nat. Prod. 1982, 45, 718.
5. 3, 100 MHz) δ 22.7 and 29.3 (q, 2 × 2″-Me), 29.0 (d, C4″), 29.6 and 30.1 (q, 2 × 1‴-Me), 40.2 (t, C3″), 41.2 (s, C1‴), 53.4 (q, OMe), 77.0 (s, C2″), 104.7 (s, C4′a), 106.4 (s, C6′), 108.0 (t, C3‴), 110.0 (d, C3′), 111.3 (d, C8), 115.6 (s, C8′), 116.5 (d, C4), 120.4 (d, C6), 120.5 (d, C5), 121.0 (s, C2), 122.8 (s, C4a), 123.3 (s, C5a), 125.5 (s, C3), 126.8 (d, C7), 133.5 (s, C1a), 139.8 (s, C8a), 140.2 (d, C4′), 140.6 (s, C1), 150.3 (d, C2‴), 151.9 (s, 5′), 153.4 (s, C8′a), 156.5 (s, C7′), 161.8 (s, 2′-CO), 173.3 (s, 3-CO).
6. 6. Wu, T. S.; Furukawa, H. Chem. Pharm. Bull. 1983, 31, 901
7. 7. Similar result was also found in a binary acridone alkaloid, glycobismine-A, in which H-11 coupled with two H-12 with coupling constants 8.5 and 10.8 Hz. See: Furukawa, H.; Ito, C.; Ono, T.; Wu, T. S.; Kuoh, C. S. J. Chem. Soc. Perkin Trans. I 1993, 471.
8. 8. Wu, T. S.; Wang, M. L.; Lai, J. S.; Ito, C.; Furukawa, H. Phytochemistry 1991, 30, 1052 and therein cited.