The stereoselective reaction of an allyl bromide with an aldehyde mediated by a low valency bismuth species was the key reaction in stereoselective syntheses of (4S,6R,8R,10S,16S)- and (4S,6R,8R,10S,16R)-4,6,8,10,16-pentamethyldocosanes. 13C NMR data for these compounds confirmed that the cuticular hydrocarbon isolated from the cane beetle Antitrogus parvulus was the (4S,6R,8R,10S,16S)-stereoisomer.
                                    在低价
铋物种介导下,烯丙基
溴与醛的立体选择性反应是合成(4S,6R,8R,10S,16S)-和(4S,6R,8R,10S,16R)-4,6,8,10,16-五甲基
二十二烷的关键反应。这些化合物的13C核磁共振数据证实,从甘蔗甲虫Antitrogus parvulus分离得到的蜡质烃为(4S,6R,8R,10S,16S)-立体异构体。