A short synthesis of koniamborine, a naturally occurring pyrano[3,2-b]indole

Tetrahedron Letters

Volumn 48, Issue 34, 2007, Pages 6019-6021

  Clawson Jr , Ronald W ^a   Söderberg, Björn C G ^a  

^a WEST VIRGINIA UNIVERSITY   (United States)

Author keywords

Alkaloid; Annulation; Palladium catalyzed

Indexed keywords

ALKALOID DERIVATIVE; INDOLE DERIVATIVE; KONIAMBORINE; PYRAN DERIVATIVE; PYRANO[3,2 B]INDOLE; UNCLASSIFIED DRUG;

ARTICLE; CHEMICAL ANALYSIS; CHEMICAL REACTION; DRUG STRUCTURE; DRUG SYNTHESIS;

EID: 34447647820     PISSN: 00404039     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.tetlet.2007.06.092     Document Type: Article

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13. -1.
14. Compound 1 has been reported in the literature but we were unable to find any analytical data.
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17. 5: C, 58.30; H, 3.67; N, 5.67. Found: C, 58.15; H, 3.38; N, 5.31.
18. 3: C, 66.97; H, 4.22; N, 6.51. Found: C, 66.69; H, 4.51; N, 6.85.
19. 3, lit. values in parenthesis) 171.0 (170.7), 160.6 (160.3), 151.4 (151.3), 145.1 (144.8), 139.0 (138.8), 123.4 (123.1), 120.5 (120.1), 115.3 (115.0), 111.9 (111.6), 109.0 (108.6), 91.7 (91.3), 55.6 (55.3), 31.2 (30.9).