Bursera

Tirucalla-7,24-dienol (92) from tea seed oil and the aldehyde (93), corresponding to methyl isomasticadienoate, from the berries of Schinus molleJ° are new natural products. Sapelins A and B, from Bursera klugii, have cytotoxic activity (see Vol. 1, p. 172). 

The structure of benulin (134), a lupene hemiacetal from Bursera arida, has been confirmed by X-ray analysis. An investigation of several Senecio species has resulted in the isolation of a series of lupane derivatives which include the acids (135), (137), and (139), the corresponding aldehydes (136), (138), and (140), the ketone (141), and betulonic acid. Three more triterpenoids (142)—(144) have... 

Poinsettifolin A serves as an example of a recently isolated flavonol with a C-5-unit attached to the chromene structure (Figure 12.9). Desmethylanhydroicaritin, isolated from Bursera leptophloea as 3,5,4 -trihydroxy-7,8-pyranoflavon, needs to be revised to 3,5,4 -triOH-7,6-pyranoflavone (compound 157, Table 12.4). ... 

Negative tests were obtained for the remainder of the samples Boswellia serrala, Bursera aptera, Bursera sp. aff. aptera, B. arho-... 

Linaloe Wood Oil occurs as a colorless to yellow liquid with a pleasant, flowery odor. It is the volatile oil obtained by steam distillation from the wood of Bursera delpechiana Poiss. (Fam. Burseraceae) and other Bursera species. It is soluble in most fixed oils and in propylene glycol. It is soluble in mineral oil, but it becomes opalescent or turbid on dilution. It is insoluble in glycerin. 

Geranyl acetate Bursera delpechiana (Burseraceae), OD-R (rose)... 

Linalyl acetate Conundrum sativum (Apiaceae), Bursera OD-R... 

Bursera delpechiana, B. spp. (Burseraceae), Lavandula spp., Origanum sipyleum (Lamiaceae), Citrus aurantium, C. limon,... 

This is the smallest group of lignan tetrahydrofurans with fewer than ten members. All of reasonably well defined constitution are 3,4-trarw-disubstituted. Of these, most attention has been directed towards burseran, a constituent of Bursera microphylla with tumour-inhibiting properties (82). Optically pure (-)-/ra/w-burseran (82) and (-f-)-cw-burseran (83) were stereoselectively synthesized from chiral butyrolactones and gas chromatographic comparison indicated that the natural... 

A halogenated member (76) of this class has already been discussed in the halo-genated monoterpenoid section. The acetates (234) have been isolated from Bursera delpechiana (cf. Vol. 4, p. 68), and the alkaloid gentiananine (235 R R = OMe,Me) has been reported from Pedicularis macrochila ... 

SR Peraza-Sanches, LM Pena-Podriguez. Isolation of picropolygamain from the resin of Bursera simaruba. J Nat Prod 55 1788-1771, 1992. 

DBM Wickramaratne, W Mar, H Chai, JJ CastiUo, NR Farmsworth, DD Soejarto, GA Cordell, JM Pezzuto, AD Kinhhom. Cytotoxic constituents of Bursera permoUis. Planta Medica 61 80-81, 1995. 

On the basis of the above spectroscopic studies, structure (7) was assigned to the bisbenzyl-y -butyrolactone-type lignan, which is actually identical to (-)-trans-2-(3,4-dimethoxybenzyl)-3-(3,4-methylenedioxybenzyl)-y -butyrolactone isolated from Bursera schlechtendalii by Cole and co-workers (ref. 10). Therefore this compound was named bursehernin after consultation with Dr. Cole. 

Oil of Linnloe. Volatile nil distilled from a Mexican wood (Bursera delpechiana Poiss. and probably other species of Bursera, Burscraceaef Constit Linalool, geraniol. meth y Iheptenone. 

Gum infections elephant tree (Bursera microphylla) or myrrh Comiphora spp ), oak bark or rhatany Krameria spp.) tinctures in combination. 

Occurrence (- )-L. in Brazilian rosewood oil (Brazilian linaloe oil , Anita rosaeodora, Lauraceae) 80-85% (+)-L. (coriandrol) in coriander oil (60- 80%) and in Mexican linaloe oil Bursera del-pechiana=B. penicillata, Burseraceae) 60-65%. L. also occurs bound to various carboxylic acids, e.g., linalyl acetate (3-acetoxy-3,7-dimethylocta-1,6-diene, C,2H2o02, Mr 196.29). The linalyl esters are synthesized from L. since they have various plications in perfumery. For synthesis of L., see Lir.. L. and L. esters are used in the perfume industry and for the synthesis of tocopherols. 

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