Ct-Pinene

To 19 8 of well-agitated distilled water plus 18 g of ditertiary-butyl-ppinene oxide that was about half racemic, half d-form. The temperature was maintained at 30°C to 50°C, first with ice bath cooling and then with tap water cooling. The addition of the pinene oxide required 1 h hours. After the addition was complete and the exothermic reaction was about over, the mixture was stirred for 1 h hours at about 30°C, and then centrifuged to separate the crude sobrerol from the liquid phase consisting of oil and water. 

Campholenic Aldehyde Manufacture. Campholenic aldehyde is readily obtained by the Lewis-acid-catalyzed rearrangement of a-pinene oxide. It has become an important intermediate for the synthesis of a wide range of sandalwood fragrance compounds. Epoxidation of (+)- Ct-pinene (8) also gives the (+)-o -a-pinene epoxide [1686-14-2] (80) and rearrangement with zinc bromide is highly stereospecific and gives (-)-campholenic aldehyde... 

Observing a process, scientists and engineers frequently record several variables. For example, (ref. 20) presents concentrations of all species for the thermal isomerization of a-pinene at different time points. These species are ct-pinene (yj), dipentene ( 2) allo-ocimene ( 3), pyronene (y ) and a dimer product (y5). The data are reproduced in Table 1.3. In (ref. 20) a reaction scheme has also been proposed to describe the kinetics of the process. Several years later Box at al. (ref. 21) tried to estimate the rate coefficients of this kinetic model by their multiresponse estimation procedure that will be discussed in Section 3.6. They run into difficulty and realized that the data in Table 1.3 are not independent. There are two kinds of dependencies that may trouble parameter estimation ... 

Self-Test F.1B The compound ct-pinene, a natural antiseptic found in the resin of the pinon tree, has been used since ancient times by Zuni healers. A 7.50-g sample of ct-pinene contains 6.61 g carbon and 0.89 g hydrogen. What are the mass percentages of carbon and hydrogen in ct-pinene ... 

Figure 24 Conversion of ct-pinene oxide at 85°C and various disc speeds.

Although both enantiomers of ct-pinene occur in nature, only the ( )-... 

Fig-fig wasp interactions are an example of highly specialized and diversified mutualism. Approximately 900 species of Ficus (Moraceae), when receptive, release floral scents that attract specific wasps (Agaonidae) for pollination. The chemical compositions of the floral scents differ considerably among different Ficus species, and several volatiles such as ( )-/3-ocimene, ct-pinene, linalool, trcrns-linalool oxide furanoside (21), 1,8-cineol, f-carvoph vllcnc, germacrene D, a-copaene, and benzyl alcohol have been identified as the dominant components of these scents.89 Such differences in composition of the floral scents of figs induce species specificity in the attraction of fig wasps.90 In addition, in fig flowers, the scent composition differs between the receptive and... 

Analysis of Reagent Purity active hydride is determined by hydrolysis of an aliquot and measuring the hydrogen evolved according to the standard procedure enantiomeric purity is determined by measuring the rotation of the ct-pinene liberated in its reaction with 0.5 equiv of N,N,N,N-Tetramethylethylenediamine (TMEDA) or reaction with aldehydes. ... 

Bicyclo[3,l,l]heptanes.—Some i.r. and Raman spectral bands have been assigned for a- and /S-pinene and the Raman circular intensity differential spectrum has been recorded for (-)-ct-pinene. ° ... 

Asymmetric reduction. This organoborane reduces aldehydes within minutes, but reduces ketones rather slowly. Of greater interest, the chiral organoborane from ( + )-cc-pinene reduces benzaldehyde-a-d quantitatively to (S)-( + )-benzyl-a-d-alcohol in 81.6%, chemical yield (equation 1). In principle the opposite enantiomer could be prepared when (- )-ct-pinene is used. 

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