Reference

Recovery of long chain dicarboxylates from fermentation solution

Recovery of long chain dicarboxylates from fermentation solution. (Bioresearch Center Co., Ltd., Japan). Jpn.In this study， 100-41-4 and 505-52-2 are also used. Kokai Tokkyo Koho JP 58193694 A2 11 Nov 1983 Showa, 6 pp. (Japanese). (Japan). CODEN: JKXXAF. CLASS: IC: C12P007-42; C12P007-44. ICI: C12P007-42, C12R001-74. APPLICATION: JP 82-74900 4 May 1982. DOCUMENT TYPE: Patent CA Section: 16 (Fermentation and Bioindustrial Chemistry) A fermn. soln. or its treated soln. contg. long chain dicarboxylic acids is contacted with a mixed solvent of an arom. hydrocarbon and an alc., ketone, or aldehyde to ext. the dicarboxylates. The ext. is cooled to cryst. the dicarboxylates. Thus, 250 mL slurry contg. ~98 g tridecanedicarboxylic acid [505-52-2]/L (pH 3.5) prepd. by fermn. of n-paraffin with Candida tropicalis was mixed with 100 mL mixt. of ethylbenzene [100-41-4] 83.4 and 1-hexanal [66-25-1] 16.6 mL and stirred at 80°. The solvent layer was filtered, washed with n-pentane, and dried to obtain a yield of 17.3 g, with 98.9% purity. .

Photosensitized oxidation of methyl linoleate monohydroperoxides: hydroperoxy cyclic peroxides, dihydroperoxides, keto esters and volatile thermal decomposition products

Photosensitized oxidation of methyl linoleate monohydroperoxides: hydroperoxy cyclic peroxides, dihydroperoxides, keto esters and volatile thermal decomposition products. Neff, W. E.; Frankel, E. N.; Selke, E.; Weisleder, D. (North. Reg. Res. Cent., U. S. Dep. Agric., Peoria, IL 61604, USA). Lipids, 18(12), 868-76 (English) 1983. CODEN: LPDSAP. ISSN: 0024-4201. DOCUMENT TYPE: Journal CA Section: 17 (Food and Feed Chemistry) Previous studies of lipid secondary oxidn. products were extended to 6-membered hydroperoxy cyclic peroxides from the singlet oxygenation of a mixt. of 9- and 13-hydroperoxides from autoxidized methyl linoleate. The oxidn. product was fractionated by silicic acid chromatog. with Et2O-hexane mixts., and selected fractions were sepd. by polar phase high-performance liq. chromatog. Products characterized by TLC, gas chromatog., UV, IR, NMR, and mass spectrometry included: 6-membered cyclic peroxides (13-hydroperoxy-9,12-epidioxy-10- and 9-hydroperoxy-10,13-epidoxy-11-octadecenoates), dihydroperoxides (8,13- and 9,14-dihydroperoxyoctadecadienoates) and keto dienes (9- and 13-oxooctadecadienoates). 3777-69-3 and 38199-50-7 which are cas registry numbers of substances are two of reagents here. The 6-membered hydroperoxy cyclic peroxides are apparently formed by 1,4-addn. of singlet O to 9- and 13-hydroperoxides with trans, trans-conjugated diene systems. Thermal decompn. of the 6-membered hydroperoxy cyclic peroxides at 200° produced methyl 9-oxononanoate [1931-63-1] and hexanal [66-25-1] as the major volatiles. Other volatiles included 2-pentylfuran [3777-69-3], pentane [109-66-0], 4-oxo-2-nonenal [89186-13-0], methyl furan-2-octanoate [38199-50-7] and methyl 9,12-dioxo-10-dodecenoate [89186-12-9]. .