Quinolizidines. XIX. Synthesis of (-)-9-demethyltubulosine.
作者:TOZO FUJII、MASASHI OHBA、HIROSHI HATAKEYAMA
DOI:10.1248/cpb.35.2355
日期:——
The chirál synthesis of (-) -9-demethyltubulosine [(-) -1] has been achieved for the first time via a “cincholoipon-incorporating route, ” which started from cincholoipon ethyl ester [(+) -7] and passed through the intermediates (-) -8, (-) -9, (+) -10, and (+) -11. As a result, the absolute configuration of the Alangium vitiense alkaloid 9-demethyltubulosine has been unequivocally established to be that represented by formula (-) -1.
(-)-9-去甲基胞嘧啶[(-)-1]的基拉合成首次通过 "炔诺酮-结合路线 "实现,该路线从炔诺酮乙酯[(+)-7]开始,经过中间产物(-)-8、(-)-9、(+)-10和(+)-11。因此,Alangium vitiense 生物碱的绝对构型被明确确定为式 (-) -1 所代表的构型。