Allenes. Part XXII. The synthesis and absolute configuration of laballenic and lamenallenic acids
Abstract
The synthesis of two naturally occurring allenic acids (–)-octadeca-5,6-dienoic acid (laballenic acid) and (–)-octa-deca-5,6-trans-16-trienoic acid (lamenallenic acid) is described and both are shown to have the R-configuration