Piperitenone Piperitone

The antimicrobial activity of piperitone oxide rich Mentha rotundifolia M. suaveolens) oil was investigated by Oumzil et al., who found it less significant than that of pulegone or piperitone rich oils. The biosynthesis of the two levorotatory diastereomers from (15,25)(+)-piperitenone oxide... 

Aldehydes in this group are as follows carvone 36, dihydrocarvone 37, isom-enthone 38, piperitone 39, pulegone (piperitenone) 40, isopulegone 41 (Structure 4.9). 

The biotransformation of (K)-(+)-pulegone was also studied by a Japanese group [116]. The major bioconversion metabolite of this substrate with Botrytis allii was (-)-(1 / )-8-hydroxy-4-p-menthen-3-one. The secondary major product from this biotransformation was isolated and its structure established as piperitenone [117]. It is interesting to note that the same group also investigated the bioconversion of piperitone, the dihydrogenation product of piperitenone a strain of Rhizoctonia solani was found able to hydroxylate the substrate preferentially at the 6-position [118,119]. 

Alkylation of isovaleramide with 1,3-dichlorobut-2-ene yields (139) after methyl-ation acid-catalysed hydrolysis and internal aldol condensation gives ( )-piperitone. The value of piperitenone and isopiperitenone formation, probably via electrocyclic reaction of the pyrolytic acetic acid-elimination product from A - and A -isomers of (49), cannot be assessed in the absence of reaction yields. (S)-(-)-Pulegone is obtained in good yield from (- )-citronellol by oxidation with pyridinium chlorochromate followed by double-bond isomerization. Low-temperature reduction of ( —)-carvone to ( —)-cz5-carveol (140) and... 

Lippia wilmsii H.H. Pearson Leaves SD 1.1-2.2 limonene, piperitone, piperitenone 79,80... 

Piperitenone Piperitenone oxide d-Piperitone Piperonyl acetate Piperonyl isobutyrate... 

Phytochemistry Aboveground parts contain essential oil with menthol, menthone, carvacrol, and pulegone (Khalmatov 1964 Gulluce et al. 2007). Thirty-seven componnds were characterized representing 97 % of the total components detected. The major constituents of the oil were trans-piperitone oxide (64.51 %) and piperitenone oxide (12.34 % Baser et al. 1997a). The seeds contain a variety of different fatty acids (Gusakova et al. 1976). 

Piperinic acid, T1 Piperitenone oxide, T4 Piperitols, T4 Piperitone, T2 Piperitone oxide, T4 Pipitzols, T1 Pisatin, Y3 Piscidic acid, A30 Plathyterpol, T39 Platicodigenin, T45 Platydesmine, K31 Platynecine, K22 Plicatic acid, Y7 Plinols, T3 Plumericin, T16 Plumieride, T16 Pluviine, K6 Podocarpic acid, T33 Podolactones, T38 Polyether antibiotics, Yll Polyporenic acid A, T50 Ponasterone, T48 Porantherine, K29 Porphyrins, Y23 Portentol, Y15 Portulal T40 Preisocalamendiol, T22 Pretoxin, T31 Pristimerin, T45 Pristimerol, T45 Proaporphine alkaloids, K3 Proline, All Prolinol, A17 Pronuciferine, K3 19-propylthevinol, K4 Prostaglandins, Y16 Protoaphins, YIO Protoemetine, K2 Protostanes, T50... 

The essential oil of T. patula and its major components (piperitone, piperitenone, and terpinolene) have antifungal activity/ The total leaf extract of T. minuta and its major flavonoid (quercetagetin-7-arabinoga-lactoside) possess considerable antimicrobial activity against Gram-positive and Gramnegative bacteria in comparison to chloramphenicol/ ... 

Piperinic acid, T1 Piperitenone oxide, T4 Piperitols, T4 Piperitone, T2 Piperitone oxide, T4 Pipitzols, T1 Piptamine, K6 ... 

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