Treatment of l(14S)-β-canadine methochloride (1b) and d(14R)-β-canadine methochloride (1c) with organometals gave d- (2b) and l-2,3-methylenedioxy-9,10-dimethoxyochotensanes (2c), respectively. The structures of these derivatives were proved by chemical and spectral means. The CD spectra of 2b showed Davydov split extrema centered at 284 nm with a positive first Cotton effect, while 2c showed the antipodal
用有机
金属处理l(14S)-β-卡丹素甲
氯(1b)和d(14R)-β-卡丹素甲
氯(1c)处理得到d-(2b)和l -2,3-亚甲二氧基-9,10-二甲氧
胆碱酯(2c)。这些衍
生物的结构通过
化学和光谱方法证明。2b的CD光谱显示Davydov分裂极值集中在284 nm处,具有第一棉花效应,而2c则显示2b的对映曲线。因此,2b和2c的绝对配置 分别得出14R和14S。