Reference

Liquid-phase autoxidation

Liquid-phase autoxidation. Imamura, Juichi (Natl. Chem. Lab. Ind., Ibaraki 305, Japan). Sekiyu Gakkaishi, 29(5), 354-63 (Japanese) 1986. CODEN: SKGSAE. ISSN: 0582-4664. DOCUMENT TYPE: Journal CA Section: 45 (Industrial Organic Chemicals, Leather, Fats, and Waxes) The liq.-phase syntheses of propylene oxide [75-56-9], peracetic acid (I) [79-21-0], and p-methoxybenzaldehyde [123-11-5] by autoxidn. were described. The liq. phase autoxidn. of propylene [115-07-1] was inferior in terms of reaction mechanism in general. Metal phthalocyanine was superior as catalysts in the liq.-phase autoxidn. MeCHO was converted to I in almost 100% yield and this reaction was successfully demonstrated at a pilot test with the use of acid catalyst. p-Methoxytoluene [104-93-8] was converted to the corresponding arom. aldehyde in high yield. This reaction needed AcOH and comparatively large amts. of Co ion. It was promoted greatly by addn. of small amts. of Br. Important factors of liq.-phase autoxidn. reactions, such as wall effect, solvent effect, and influence of heavy metals were discussed.

Camembert aromas

Camembert aromas. Demonstration of other minor compounds. Dumont, J. P.; Roger, Sylviane; Adda, J. (Lab. Technol. Lait., Inst. Natl. Rech. Agron., Jouy-en-Josas, Fr.). Lait, 56(559-560), 595-9 (French) 1976. CODEN: LAITAG. DOCUMENT TYPE: Journal CA Section: 17 (Foods) As was demonstrated by gas chromatog.-mass spectrometry, a Freon 11 ext. of an aq. soln. of volatiles of Camembert cheese (isolated by low-temp. vacuum distn.) contained, in addn. to hydrocarbons already identified (cf. J. P. Dumont, et al., 1974 and M. Moines, et al., 1973, 1975), bis(methylthio) methane [1618-26-4], diethyl disulfide [110-81-6], 2,4,5-trithiahexane [42474-44-2], anisole [100-66-3], 4-methylanisole [104-93-8], 2,4-dimethylanisole [6738-23-4], as well as the C6 and C8 esters of 3-methyl-1-butanol. The CH2Cl2 ext., made next, contained alcs. and phenols almost exclusively; in addn. to compds. already reported (cf. J. P. Dumont, et al., 1974) 3-methylthiopropanol [505-10-2] and 3-methyl-2-cyclohexen-1-ol [21378-21-2] were identified. The CH2Cl2 ext. residue had the flavor of Camembert cheese but was flat; compds. of the Freon ext. added the pungent and floral principles.Except for chemicals metioned above, 100-66-3 and 110-81-6 are also used. .