ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The preparation of alkyl esters of cis,cis-Δ^9,12-octadecadienoic acid and cis,cis,cis-Δ^9,12,15-octadecatrienoic acid. II.

Š. Kováč

Slovak Technical University, Bratislava

Abstract: The prepn. of alkoxyesters of IIIa and VIII by debromination of tetrabromostearic acid and hexabromostearic acid with Zn in monoalkyl ethers of glycols was described. The esters were evaluated by paper chromatography and their Rf values calcd. Phys. and chem. consts. and infrared absorption spectra are given. Because the absorption wave at 970 cm.-1 which is characteristic for unsaturated compds. with transconfiguration, was not present, it was estimated that the compds. are cis,cis-isomers or cis,cis,cis-isomers. Acid, alkoxy, n20D, and Rf of alkoxy esters of IIIa and VIII are: IIIa, CH₂CH₂OMe, 1.4715, 0.650; IIIa, CH₂CH₂OEt, 1.4695, 0.630; IIIa, CH₂CH₂OPr, 1.4692, 0.620; IIIa, CH₂CH₂OBu, 1.4689, 0.500; IIIa, (CH₂CH₂O)2Me, 1.4684, 0.840; IIIa, (CH₂CH₂O)2Et, 1.4683, 0.800, IIIa, (CH₂CH₂O)2Pr, 1.4657, 0.710; IIIa, (CH₂CH₂O)2Bu, 1.4654, 0.690; VIII, CH₂CH₂OEt, 1.4720, 0.640; IIIa, (CH₂CH₂O)₂CH₂CH₂OH, 1.5213, -.

Full paper in Portable Document Format: 161-2a89.pdf (in Slovak)

Chemical Papers 16 (1-2) 89–95 (1962)