Mentha haplocalyx

The synthesis of l(7)-menthene-2,8-diols (655) has been mentioned (Vol. 4, p. 526, Ref. 503) the two isomers have now been isolated from Osmitopsis asteriscoidesThe known acetate 656, an insect repellent, has been isolated from Mentha haplocalyx oil, and a review of synthetic methods has been published by Verghese. In this connection, attention is drawn to a method for reducing an epoxide in the presence of a ketone, by reaction with phenyl telluride anion, PhTe, then triphenyltin hydride. The dihydrocarvone epoxides (657) yielded the hydroxy dihydroketone 658 corresponding to 656. Note also... 

To our knowledge, very few examples of natural products possessing a l,3-dimethyl-2-phenylnaphthalene skeleton are known. The only ones are neolignans isolated from Mentha haplocalyx [19] and Salvia officinalis [20], Fig. (9). 

Mentha arvensis L. M. haplocalyx Briq. China Menthol, menthone, menthyl acetate.33 Stimulate gastrointestinal tract motility and central nervous system, dilate peripheral blood vessels. Increase sweat gland secretion. 

Mentha arvensis L., M. dahurica Fisch. ex Benth., M. haplocalyx Briq., M. sachalinensis (Briq.) Kudo, M. sachalinensis (Briq.) Kudo f. arguta (Kitag.) Y. C. Chu Artocarpus heterophyllus Lamarck Macleaya cordata Psoralea corylifolia L. 

Luffa aegyptiaca, L. cylindrica, L. faetida, L. petola, Mentha arvensis, M. dahurica, M. haplocalyx,... 

Cinnamomum cassia, Cnidium monnieri, Kaempferia galanga, Mentha arvensis, M. haplocalyx Scutellaria baicalensis, S. macrantha, S. lateriflora... 

J. horizontalis, Menispermum palmatum, Mentha arvensis, M. haplocalyx, M. spicata, M. x piperita, Schizonepeta tenuifolia, Tagetes erecta, T. patula Lonicera caerulea, L caprifolium... 

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