Gamma-terpinene

Poncirus trifoliata Rafin Gou Gi (Trifoliate orange) (fruit) Poncirin, limonin, imperatorin, bergapten, neohesperidin, citrifoliol, myrcene, camphene, gamma-terpinene.33 Treat gastric pain, constipation, and prolapse of the uterus or rectum. 

Methanol reacts with limonene over acidic catalysts in a batch reactor to 1-methyl-4-[alpha-methoxy-isopropyl]-l -cyclohexene (alpha-terpinyl methyl ether) as the main reaction product (see Eq. 15.3.3 R- = CH3-). Besides the desired methoxylation, isomerisation reactions leading to terpinolene and traces of alpha-and gamma-terpinene can be observed. Furthermore, the addition of methanol to the methylterpinylether leads to the undesired cis- or trans-1,8-dimethoxy-p-menthane. The amount of unidentified products does not exceed 1%. At high temperatures and long reaction times the reverse reaction of the alpha-terpinyl methyl ether and the other addition products to limonene and its isomers can be observed. The reaction scheme of the alkoxylation oflimonene is illustrated in Equation 15.3.5. 

C10H16 gamma-terpinene 99-85-4 -59.03 1.0613 2 20583 C10H17N2OS 4-isothiocyanato-tempo, free radical 36410-81-8 25.00 1.0846 2... 

C9H14 ethyl norbene 15403-89-1 3.981 20326 C10H16 gamma-terpinene 99-85-4 4.615... 

CIC The weak juicy flavour is based on geraniol, geranyl acetate and neryl acetate in combination with linalyl ethyl ether and myrcenyl ethyl ether. The cold pressed peel oil has a high terpene content. Its flavour is dominated by citral, gamma-terpinene and alpha-pinene. Citral is recognized as a very important contributor to the fresh lemon character, although it decomposes within a few weeks in acidic soft drinks. 

CIC The lemon like cold pressed lime oil is characterized by a relatively high citral content, balanced with beta-pinene, gamma-terpinene and neryl acetate. The distilled oil is a mixture of acid catalyzed breakdown products of terpenes 1,4-cineole, 1,8-cineole and alpha-terpineol are the backbones of this oil, rounded off with gamma-terpinene, other terpene hydrocarbons and alcohols. 

CIC The basis of the heavy aromatic flavour is methyl-N-methyl anthranilate in combination with gamma-terpinene. The orange citrus note results from the presence of octanal, decanal and alpha-sinensal. 

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