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The stereoselective synthesis of (5Z,9Z)-tetradeca-5,9-diene-1,14-dioic acid was carried out using Ti-catalyzed homo-cyclomagnesiation of 2-(hepta-5,6-dien-1-yloxy)tetrahydro-2H-pyran. Intermolecular esterification of this dicarboxylic acid with polyether acetylenic alcohols in the presence of carbodiimides was used to synthesize the corresponding monoesters and symmetric diesters. Using the intramolecular oxidative coupling of terminal triple bonds of the latter compounds, polyether macrodiolides containing 1Z,5Z-diene and 1,3-diyne fragments were synthesized. [ABSTRACT FROM AUTHOR]

Stereoselective synthesis of (7Z,11Z)-octadeca-7,11-diene-1,18-dioic acid was carried out using a homo-cyclomagnesiation reaction of 2-(nona-7,8-dien-1-yloxy)tetrahydro-2H-pyran. After Steglisch esterification of the synthesized acid and polyester acetylenes in the presence of DCC and DMAP, the corresponding diesters were synthesized in good yields (67–75%). Based on symmetric diesters with terminal triple bonds, polyether macrodiolides containing conjugated triple bonds and pharmacophoric cis,cis-1,5-diene fragments in their structure were synthesized for the first time. [ABSTRACT FROM AUTHOR]