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(-)反式-4R(4-氟苯基)-3S-羟甲基-1-甲基哌啶的合成
引用本文:王一军,从顺宝.(-)反式-4R(4-氟苯基)-3S-羟甲基-1-甲基哌啶的合成[J].化工中间体,2007(11):8-12,28.
作者姓名:王一军  从顺宝
作者单位:[1]浙江捷马化工有限公司,浙江杭州310003; [2]上虞颖泰化工有限公司,浙江绍兴312000
摘    要:亚磷酸三乙酯与氯乙酸乙酯进行缩合、重排、脱氯乙烷合成磷酸酯,再与对氟苯甲醛经Knoevenagel反应合成肉桂酸酯,肉桂酸酯与丙二酸二乙酯胺解合成的N-甲胺基羰基乙酸乙酯环合得到哌啶二酮。环化物用硼氢化钾复合还原剂还原得±4-(4-氟苯基)-3-羟甲基-1-甲基哌啶,对混旋体进行手性拆分得目标产物(4R,3S)-4-氟苯基-3-羟甲基-1-甲基哌啶。选择自制酸载硅胶催化剂catl#、醋酸-乙二胺催化剂cat2#、复合相转移催化剂cat3#为各步催化剂,反应收率分别为89.1%,96.3%,86.5%,76.3名,87.2%,43.7%,总收率24.3%,比旋光度-36~-38°,纯度大于99%。

关 键 词:亚磷酸三乙酯  氯乙酸乙酯  N-甲胺基羰基乙酸乙酯  4-氟肉桂酸乙酯
文章编号:1006-253x(2007)11-008-5
收稿时间:2007-04-13

Synthesis of (-)-Trans-4R-(4'-fluorophenyl)-3S-hydroxymethyl-1-methylpiperidine
Authors:WANG Yi-jun  CONG Shun-bao
Affiliation:WANG Yi-jun,CONG Shun-bao (1.Zhejiang JMC Chemical Co., Ltd., Hangzhou 310003, Zhejiang, China; 2.Shangyu Yingtai Chemical Co., Ltd., Shaoxing 312000, Zhefiang, China)
Abstract:The preparation of (-)trans-4R-(4'-fluorophenyl)-3S-hydroxymethyl-l-methylpiperidine from triethyl phosphite, diethyl malonate,4-fluorobenzaldehyde,ethyl chloroacetate, under the condition of existing cat1#,cat2#, cat3# catalysts was presented. The effect of catalyst 1#,2#,3#, reduction agent, chiral resolving agent and pH control was discussed.The overall yield is 24.27%, the optical rotation is -36~-38°, and the HPLC purity is over 99%.
Keywords:triethyl phosphate  diethyl malonate ethyl chloroacetate  4-fluorobenzaldehyde  ethyl 4- florocinnamate  4R-(4'-fluorophenyl)-3S-hydroxymethyl-l-methylpiperidine  chiral resolving agent  4- (4-flurophenyl)-3-ethoxycarbonyl- 1-methyl piperdine-2  6-dione
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