A New Route to Methyl (<i>R,E</i>)-(−)-Tetradeca-2,4,5-trienoate (Pheromone of <i>Acanthoscelides</i> <i>obtectus</i>) Utilizing a Palladium-Catalyzed Asymmetric Allene Formation Reaction
作者:Masamichi Ogasawara、Takashi Nagano、Tamio Hayashi
DOI:10.1021/jo050684z
日期:2005.7.1
A formal total synthesis of the sex attractant of male dried bean beetle, methyl (R,E)-(−)-tetradeca-2,4,5-trienoate, was achieved by a new efficient route utilizing the Pd-catalyzed asymmetric allene synthesis reaction. It was found that the atropisomeric biaryl bisphosphine (R)-segphos showed better enantioselectivity than (R)-binap in the Pd-catalyzed reaction for preparing alkyl-substituted axially
通过利用钯催化的不对称丙二烯合成的新有效途径,完成了雄性干甲虫的性别引诱剂的正式全合成,甲基(R,E)-(-)-十四碳-2,4,5-三烯酸酯反应。发现在Pd催化的制备烷基取代的轴向手性烯基的反应中,阻转异构的联芳基双膦(R)-segphos显示出比(R)-binap更好的对映选择性。