作者:Jigar Soni、V. Premasagar、Sonal Thakore
DOI:10.2174/1570178612666150113231048
日期:2015.3.24
An improved method for the synthesis of 3-quinuclidinone hydrochloride 4 from
piperidine-4-carboxylic acid 1 has been described. Reaction of piperidine-4-carboxylic acid 1 with
thionyl chloride and ethanol gave ethyl piperidine 4-carboxylate 2. It was further condensed with
methyl chloroacetate in presence of sodium carbonate to give ethyl 1-(2-methoxy-2-
oxoethyl)piperidine-4-carboxylate 3. One pot Dieckmann reaction of 3 in presence of potassium tertbutoxide
followed by hydrolysis and decarboxylation gave title compound azabicyclo[2.2.2]oct-3-one
hydrochloride 4.
描述了一种改进的合成氢氯酸 3-喹啉酮的 方法 4, 起始原料为 4-哌啶羧酸 1。将 4-哌啶羧酸 1 与氯化亚砜和乙醇反应可生成乙基 4-哌啶羧酸酯 2。随后在碳酸钠存在下与氯乙酸甲酯进行缩合反应,得到乙基 1-(2-甲氧基-2-氧乙基)哌啶-4-羧酸酯 3。在钾叔丁醇的存在下对 3 进行一锅式 Dieckmann 反应,随后进行水解和脱羧反应,得到了标题化合物氢氯酸 azabicyclo[2.2.2]oct-3-one 4。