Khaya anthotheca

Tetranortriterpenoids.—The structure of sendanin (72), from the bark of a Japanese variety of Melia azedarach, has been confirmed by AT-ray analysis. The novel enol-ether (73) has been isolated from the heartwood of Khaya anthotheca along with 11/3- and lla-acetoxyazadirone (74) and (75). Zinc-copper couple is a very convenient reagent for reduction of epoxides, a,/S-epoxy-lactones, a/S-unsaturated ketones, and a-ketols. The full details of the X-ray analysis of prieurianin have appeared. " ... 

Khaya grandiflora DC. African Mahogany Khaya ivorensis A. CHEV. Kahya Mahogany Khaya anthotheca C. DC. Krala... 

Zentralbl Haut Geschlechtskrankheiten 36 728 Morgan JWW, Orsler RJ (1967) A simle test to destinguish Khaya anthotheca from Khaya ivorensis and Khaya grandifolia. J Inst Wood Sci 18 61-64... 

Morgan JWW, Wilkinson DS (1965) Sensitization to Khaya anthotheca. Nature 207 1101... 

Morgan JWW, Orsler RJ, Wilkinson DS (1968) Dermatitis due to the wood dust of Khaya anthotheca and Machaerium scleroxylon. Br J Ind Med 25 119-125 Nava C, Mardisio M, Priatino Vangova G, Arbosti G (1975) Aspetti della malattia di Mansonia altissima. Med Lav 66 574-576... 

Khaya anthotheca K. ivorensis African mahoganies white, dry zone, and big leaf mahogany Anthothecol, 2,6-DMBQ 10% Sawdust in pet. True mahoganies. K. ivorensis most common mahogany in U.S. Same symptoms as American mahoganies... 

Extractives from the Seed of Khaya anthotheca (Welw). C. DC. J. Chem. Soc. Chem. Commun. 1967. 379. 

Ekong, D. E. U., J. I. Okogun, and B. L. Sondengam The Meliacins (Limonoids) Minor Constituents of Khaya anthotheca. Reduction of the Meliacins with Zinc-Copper Couple. J. Chem. Soc. Perkin Trans. I, 1975, 2118. 

Morgan and Wilkinson (130) described seven compounds that are known to cause sensitization. They noted a further nine woods that give various symptoms of sickness. Among Khaya spp., in particular, nine cases of dermatitis resulted from contact with K, anthotheca. They were able to show (131) in five cases that sensitization was due to the presence of anthothecol, a triterpene derivative. The subjects were sensitive to this compound, and not to the extractive-free wood. They believed that the sensitization to this timber was non-typical and possibly caused by variations in extractive contents of particular K, anthotheca timber. 

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