Synthesis of 19-cis-docosenoic, 17-cis-eicosenoic and 15-cis-octadecenoic acid
作者:R. Klok、G. J. N. Egmond、H. J. J. Pabon
DOI:10.1002/recl.19740930806
日期:——
Large-scale syntheses of 19-cis-docosenoic, 17-cis-eicosenoic and 15-cis-octadecenoicacid by chain extension of 8-undecynoic acid via Kolbe's anodic synthesis, as well as by coupling of 1-butyne with n-bromoalkanoic acids were found unsuitable. Therefore, 15-octadecynoic acid was prepared on a large scale from 13-hexadecyn-1-ol by malonic ester coupling. Esterification and reduction with lithium aluminium