作者:G. D. Gamalevich、B. N. Morozov、E. P. Serebryakov
DOI:10.1007/bf01433762
日期:1996.1
All four stereoisomers of 2,6-dimethyloctan-1-ol, the nearest precursors of the title formates, were synthesized in five to eight stages, with configurational purity ranging from 41 to 96 %, employing a stereodivergent scheme based on the partial hydrolysis of two pseudoracemic substrates, (2RS,6R)-2,6-dimethyloct-1-yl formate and (2RS,6S)-2,6-dimethyloct-1-yl acetate, in the presence of porcine pancreatic lipase (PPL). Configurations and diastereomeric compositions of the alcohols thus obtained were determined by correlating the latter with (S,S)-4,8-dimethyldecanal, prepared on the basis of enantioselective biohydrogenation of (R)-2,6-dimethylocta-2,7-dienal with bakers' yeast, and by comparing the [alpha](D) values of the alcohols with their NMR data and/or with those of their (S)-MTPA derivatives. The attractant potency of stereoisomeric 2,6-dimethyloct-1-yl formates towards Tribolium confusum was found to vary depending on their diastereomeric composition. The configuration at C(6) exerts some influence on the stereoselectivity of the PPL-catalyzed hydrolysis of pseudoracemic 2,6-dimethyloct-1-yl formates.