Piperidine Derivatives. XVI. C-Alkylation of 1-Benzoyl-3-carbethoxy-4-piperidone. Synthesis of Ethyl 3-Ethyl-4-piperidylacetate (dl-Ethyl Cincholoiponate)
作者:Gilbert Stork、S. M. McElvain
DOI:10.1021/ja01210a041
日期:1946.6
309-314' d.: 312',11 316' d.la)). The product weighed 0.49 g. (84%) and decolorized aqueous permanganate immediately. Anal. Calcd. for CJ3loOnNCl: C1, 21.67. Found: C1, 21.54. The p-toluenesulfonyl derivative of guvacine, prepared according to Freudenberg," melted at 166-167' (reported,
已经重新固化。苯甲酸在试管的较冷部分以升华物的形式出现,并且可以闻到微弱的苯甲酰氯气味。冷却后,将氯仿加入剩余的固体中以溶解任何苯甲酸和不变的IX;未被该溶剂溶解的未溶解的白色固体是盐酸番红花碱,它基本上是纯的,mp 304405'd。先前变暗(先前报道的熔点:309-314' d.:312',11 316' d.la))。产物重0.49g。(84%) 并立即脱色高锰酸盐水溶液。肛门。计算。对于 CJ3loOnNCl:C1,21.67。发现:C1,21.54。根据科德宝公司制备的番红花碱的对甲苯磺酰基衍生物”在 166-167' 熔化(据报道,