ISSN:
0018-019X
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Leaf-gland pigments from labiatae: structures of 13 diterpenoids (coleons) from Solenostemon sylvaticus (GÜRKE) T.T. AYE and Coleus garckeanus VATKEThe above mentioned East-African labiatae have been investigated for their leaf-gland pigments. The two plants contain very similar abietanoic diterpenoids. Besides the already known coleons O (5a) and W (1a), 11 novel compounds have been isolated and their structures established:Diosphenol: 16(or 17)-O-acetyl-coleon W (1b).Diketones: Coleon X (16 or 17)-acetoxy-11, 12, 14, 17 (or 16)-tetrahydroxy-abieta-8, 11, 13-triene-6,7-dione (2a); 16 (or 17)-O-acetyl-coleon X (2b).Spiro-coleons: 6-O-acetyl-19-acetyloxy-coleon Q (3b); 12-O-desacetyl-7-O-acetyl-19-acetyloxy-coleon Q (3c); 12-O-desacetyl-7-O-acetyl-19-acetyloxy-coleon P (3e); 12-O-desacetyl-7-O-acetyl-3β, 19-diacetyloxy-coleon Q (4b); 19-acetyloxy-coleon O (5b); 12-O-desacetyl-6-O-acetyl-17-acetyloxy-coleon P (7); 7-desoxy-12-O-desacetyl-3-acetyloxy-coleon N (6b); coleon Z (8).Compound 7 contains a spiro cycloprope unit, substituted by one carbonyl and two carbinol functions. Compound 8 (Coleon Z) contains a unique cis-butadiene unit formed from C(3)-C(4)-C(18)-C(19).
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/hlca.19790620734
Permalink
